仿生鱼骨液冷耦合复合相变材料的电池热管理研究OA

To mitigate thermal runaway risks caused by latent heat exhaustion of phase change materials during high-rate battery discharge processes,a novel compact battery heat exchange system incorporating bionic fishbone liquid cooling and CPCM(composite phase change materials)was proposed.The system utilized aluminum foam skeletons to intensify heat transfer and prevent leakage of paraffin wax,while employing biomimetic fishbone-shaped liquid cooling channels to dissipate heat absorbed by paraffin wax.Numerical simulations were conducted to investigate the effects of fishbone channel dimensions,CPCM width between adjacent bone-shaped branches,coolant inlet velocity and temperature on battery cooling performance.The difference between various cooling methods were analyzed.The results indicate that optimized cooling occurrs as the key parameters are as follows:main channel width 8 mm,branch width 2 mm,inter-branch spacing 6.15 mm and angle 80° between main channel and branches.The maximum temperature reduction achieves 56.3 ℃ compared with the natural cooling,while the pressure drop reduction reaches 52.09％contrasted with the traditional Z-shaped channels.Under the conditions of initial battery temperature 50 ℃,coolant velocity 0.3 m/s,inlet temperature 46 ℃ and counter-flow arrangement between adjacent channels,the battery pack maintains the highest temperature 50.27 ℃ and the maximum temperature difference of 3.74 ℃.This work provides an innovative strategy to intensify heat dissipation,promising for thermal management of batteries with plentiful heat generation.