Development And Improvement Of Vacuum Vibration Dryer For Lithium Cathode Materials

Lithium-ion battery cathode materials have the largest capacity and highest added value in the lithium-ion battery market,and their performance directly affects the service life of lithium-ion batteries.At present,there are few domestic engineering enterprises that can provide the design,development and supply capacity of the whole production line of lithium-ion battery cathode materials.As the core equipment of lithium-ion battery cathode material production line,the design and development of vacuum vibration dryer in lithium-ion battery cathode material production line is the first time in China.This subject relies on the joint research project of the school of mechanical and electrical engineering of Hebei Normal University of science and technology and Qinhuangdao manguo Chemical Machinery Equipment Limited Company,and take the vacuum vibration dryer in the lithium-ion battery cathode material production line as the research object to carry out engineering research and development.On this basis,the prototype test,factory test and trial production test are carried out.After the practical engineering test,the cylinder part of the vacuum vibration dryer produced slight fatigue damage in the trial production test.Then,the equipment was improved by means of computer aided design and analysis,and the improved results were verified.The test and subsequent practical engineering application confirmed that the final equipment design was safe and reliable,reaching the performance indexes required by the production line.The main research contents are as follows:1.In the absence of design reference materials and research and development experience in China,the scheme of vacuum vibration dryer was designed by referring to the existing approximate design standards,and the detailed design of mechanical structure was carried out by using parametric design software.The research and development of the first horizontal vacuum vibration dryer for lithium-ion battery cathode material in China was completed.2.In this thesis,the reliability of vacuum vibration dryer is verified by three rounds of tests,such as delivery test,trial production test and verification test after structural improvement.Through the delivery test,it is proved that the structure design of vacuum vibration dryer meets the technical requirements and meets the factory requirements.Through the trial production test,it was found that there were problems in the vacuum vibration dryer and its structure was improved in time.On the basis of the improvement,the verification test was further carried out,which confirmed that the final equipment design was safe and reliable.3.In this thesis,the research and development process of vacuum vibration dryer is deeply and effectively combined with a variety of computer-aided design methods.The stress and strain of vacuum vibration dryer were analyzed by ANSYS software.The displacement of dangerous parts and dangerous parts at the maximum stress were obtained,and the possibility of plastic failure was excluded.The free modal analysis of vacuum vibration dryer was carried out by ANSYS software.The free modal analysis of the vacuum vibration dryer was carried out by using ANSYS software,and its natural frequency and modal shape were obtained,which eliminates the possibility of resonance.The fatigue life of vacuum vibration dryer was analyzed by n Code software and the possibility of fatigue failure was verified,and its failure was prevented by structural improvement.Based on the trajectory visualization of lithium-ion battery cathode material(mainly nickel)in vacuum vibration dryer,the trajectory of lithium cathode material was analyzed by EDEM software,and the elliptical layered trajectory of lithium-ion battery cathode material along the cylinder wall was obtained.