Design And Research On The Key Structures And Control System Of Large Battery Winding Machine

With the continuous expansion of the energy storage industry and the new energy market,ordinary small lithium batteries can no longer meet the needs of the new energy market,and large-capacity lithium batteries have become a new trend in the energy market.It has the characteristics of high energy,high rated operating voltage,and long storage life of electric energy.Therefore,large-capacity lithium batteries will become the first choice for energy applications such as energy storage equipment and new energy power tram power supplies.Lithium battery cell winding molding is an important process in the battery molding manufacturing process,and the winding machine is a key device that determines the battery cell molding size,yield,and production efficiency.Today,domestic battery cell production equipment is mainly manual or semi-automatic winding equipment.This type of equipment has low automation and low cell production efficiency.The battery cells produced are of poor quality and small size and cannot be produced.Requirements for large battery cells.Based on the needs of the new energy market,this paper combines the winding process of the battery cell,designs the key structure of the battery cell winding machine and the control system,thereby completing the design of the fully automatic large-scale battery cell winding machine.Developed to provide a design reference solution for the optimal design of large battery cell winding machines.Firstly,this paper analyzes the process and technical requirements of large battery cell winding machines,and according to the process and technical parameters,constructs the key structural design scheme and automatic control system design scheme of large battery cell winding machines.Secondly,according to the design scheme of the key structure of the large battery cell winding machine,the key structure of the fully automatic large energy storage battery cell winding machine was designed using Solidworks 3D modeling software,and an automatic winding drawing of the large battery cell was designed.Needle picking auxiliary mechanism,which solves the problems of unstable tension of large battery cells during the winding process,difficulty in drawing needles and poor flatness of the surface of the battery cells after the needles are pulled out,thereby achieving high accuracy,Automatically completes winding and finishing of large-diameter cells and assists in automatic taking and sending of cells.Thirdly,the finite element technology is used to perform static and dynamic simulation analysis on the key structure of the needle rolling mechanism.Since the rationality and stability of the design of the needle rolling mechanism directly affects the accuracy of the cell winding molding,the multi-objective parameter optimization method is used to optimize the needle rolling mechanism.Design,so as to improve the mechanical properties of the needle mechanism,and complete the lightweight design of the structure.Then,according to the design scheme of the automatic control system and the process flow of the large battery cell winding machine,the control needs were analyzed.The PLC was selected as the main controller and the related control components were used to complete the hardware design and control program of the winding machine.Design and design of human-machine interface.According to the control theory knowledge,a decentralized tension control scheme is proposed,so that the core maintains the role of constant tension during the winding process,and the mathematical model of the relevant tension control system is established in combination with the theoretical knowledge of numerical analysis,which is implemented for the winding machine Constant tension control provides a control design solution.Finally,the prototype is assembled and tested.After testing that the prototype can work normally,perform a winding test of the large-scale battery cells,and make the wound battery cells into large-scale cells.Then perform the parameter performance on the prepared battery.Test to verify whether the parameters of the battery performance meet the relevant requirements.