The Research And Development Of Vacuum Continuous Equipment For Power Li-Ion Batteries' Liquid Injection

At present,liquid injection technology is an important factor that affects the consistency of lithium ion power batteries in the production process of lithium ion power batteries.In order to improve the consistency of lithium ion power batteries,it is necessary to eliminate the effects of human and external environmental factors on the injection's accuracy and the liquid injection's environment in the process of liquid injection.Aiming at the problems of low degree of automation and environmental impact of lithium ion power batteries,the paper proposes the continuous vacuum injection equipment for lithium ion power batteries,which realizes vacuum environment and automation in liquid injection process and avoids the influence of human factors and external factors.The specific research contents are as follows:1.To determine the overall plan of vacuum continuous injection equipment for lithium ion power batteries.Through the modular design method,combined with the injection process of lithium ion power batteries,this paper designs the vacuum continuous injection system for lithium ion power batteries.The whole lithium ion power batteries injecting equipment is divided into six modules: the battery in and out module,the transfer module,the scanning and weighing module,the delivery module,the vacuum injection module,the vacuum infiltration module and the vacuum pre seal module.And the overall scheme of the vacuum continuous liquid injection equipment for lithium ion power battery is preliminarily determined.2.According to the overall plan of the vacuum continuous liquid injection equipment for lithium ion power battery,the function analysis and structure design of the related modules of the equipment are carried out.Using transition chamber to connect the pre and post injection process,Designing a plate type vacuum separate door whose trajectory determined the transition warehouse volume.The reciprocating of the electric core cycle trolley is realized through the double-layer channel.Setting the vacuum box to provide the vacuum environment needed for the injection.3.The failure analysis of the mechanical system based on TRIZ for the proposed vacuum continuous liquid injection equipment for lithium ion power batteries.In order to reduce the cost of processing and improve the reliability of the system,the reverse fishbone diagram in TRIZ is used to conduct the omni-directional system modeling to the device of the trial production.The inevitable failure mode of each part of the system is determined by reverse questioning and screening.By the method of based on economic loss risk priority number(ELRPN),we objectively analyze the selected failure modes,determine the priority levels of all failure modes and sort them,finally get the important failure modes.4.Obtaining the optimal solution of vacuum continuous injection equipment for lithium ion power batteries.The important failure modes of all are solved by the matterfield model and the 40 principles of invention in TRIZ.The optimal schemes are selected from each failure mode solution.By comparing these optimal schemes,the optimal solution for the lithium ion power batteries vacuum continuous injection device is determined.The system of the optimization is analyzed and solved again by failure mode,and the optimality of the new system is determined.