基于液冷流道结构的锂电池热管理系统优化设计OA

To address high temperatures and large temperature differences in lithium-ion battery packs under high discharge rates,a parallel turbulent flow liquid-cooling channel design was proposed.First,five battery thermal management systems a-e with different liquid cooling channels were designed,and their heat dissipation performance,flow field characteristics and pressure drop were analyzed.The results show that a symmetrical channel layout,arc-shaped transition nodes and periodic turbulence structures enhance battery pack cooling and reduce energy loss.Compared with the five reference structures,the optimized parallel turbulent flow channel structure f achieves a maximum temperature reduction of 0.174℃,a maximum temperature difference reduction of 0.028℃,an average temperature reduction of 1.134℃,and a pressure drop decreased to 20.466 Pa.For the optimized structure,the effects of coolant flow velocity and temperature on the thermal management system performance were further investigated.The study show that increasing the coolant flow rate or decreasing the coolant temperature can effectively reduce the battery pack′s maximum and average temperatures,but leads to a significant increase in the maximum temperature difference and system pressure drop.Considering the balance between energy consumption and heat dissipation,the optimal operating parameters for the optimized structure are determined as a flow velocity of 0.05 m/s and a temperature of 25℃.This research provides a reference for designing turbulent flow channel architectures that balance temperature uniformity with energy efficiency.