Study On Performance Analysis And Structure Optimization Of Thermal Shrinkage Channel In Battery Packaging

Thermal shrinkage packaging is one of the important packaging methods at present.The thermal shrinkage channel of battery packaging is the most important device in battery thermal shrinkage packaging.Its structure and performance directly determine the quality of thermal shrinkage packaging.The rationality of the flow field distribution in the thermal shrinkage channel directly affects the shrinkage uniformity of the thermal shrinkage film,so it is of theoretical significance to study the influence of the thermal shrinkage channel structure on the internal flow field distribution.In this paper,the thermal shrinkage channel of battery packaging is taken as the research object,based on the thermal shrinkage mechanism of thermal shrinkage film,combined with finite element analysis and experimental verification,the internal structure of thermal shrinkage channel is optimized.The specific contents of the study are as follows:Firstly,based on the shrinkage mechanism of thermal shrinkage packaging film and the temperature change curve of the film in the channel,the specific causes of the temperature change of the thermal shrinkage film in the thermal shrinkage channel are analyzed,the ideal temperature distribution curve in the channel is obtained,and the measures to improve the internal structure of the channel are put forward.Secondly,through the fluid simulation of the original thermal shrinkage channel structure,the internal flow field distribution and existing problems are analyzed,and the measures such as changing the type and position distribution of heating elements,the position and distribution of outlet,increasing the area of return tuyere and increasing the diameter of vane are put forward to improve the distribution of flow field and reduce the energy loss in the channel.The simulation results show that the internal temperature distribution of the channel is in good agreement with the ideal distribution curve,and the wind speed of the outlet reaches 7 m / s on each surface of the film,which meets the optimization goal.The outlet temperature of the battery is reduced by 40 ?,the heat loss and the processing requirements of the thermal shrinkage channel are effectively reduced,and the processing cost is saved.Finally,the improved thermal shrinkage channel and the packaging effect under different temperature and wind speed combinations are tested and verified.The experimental results show that the better wind speed and temperature combination in the improved thermal shrinkage channel are as follows: the thermal shrinkage temperature range is 460 K ~480 K,and the thermal shrinkage wind speed range is 6 ~7 m /s.In this paper,the shrinkage mechanism of thermal shrinkage film is studied,and the structure of thermal shrinkage channel is improved and optimized according to the simulation analysis,and the improved thermal shrinkage channel structure is determined,which provides a theoretical basis for improving the performance and structure of thermal shrinkage channel of battery packaging.Of course,the thermal shrinkage packaging equipment is greatly affected by the surrounding environment,especially the temperature is the most affected.On this basis,the processing temperature can be adjusted properly in different seasons to obtain a better thermal shrinkage packaging effect.