基于波纹形液冷通道的锂电池热管理系统研究与优化OA

In order to solve the problem of high temperature and large temperature difference of lithium-ion battery pack under high discharge multiplication rate,an innovative corrugated shaped liquid cooling battery thermal management system was proposed.The accuracy and reliability of the research methodology were validated through experiments.Firstly,the effects of runner depth and liquid cooling plate wall thickness on the cooling performance and power consumption of the system were investigated,followed by structural optimization.Subsequently,the effects of coolant mass flow and coolant temperature on the cooling performance and power consumption of the optimized structure were analyzed in detail.The results show that increasing the runner depth or the wall thickness of the liquid cooling plate can effectively reduce the maximum temperature,average temperature and maximum temperature difference of the battery pack.After the structure optimization,the maximum temperature,average temperature,maximum temperature difference and pressure drop of the battery pack are reduced by 1.18,1,1.08℃ and 156 Pa,respectively.For the optimized structure,increasing the coolant mass flow or lowering the coolant temperature can further reduce the maximum and average temperature of the battery pack,but the maximum temperature difference and system pressure drop will increase.At a coolant temperature of 20℃,the critical coolant mass flow that meets the cooling requirements is 0.6 g/s.While at a coolant mass flow of 1 g/s,the critical coolant temperature is approximately 25℃.These findings indicate that the proposed corrugated liquid cooling system can provide some reference for the design of battery thermal management system.