圆柱形锂离子电池模组微通道液冷热模型

发布时间：2018-05-06 00:25

本文选题：锂离子电池 + 热模型　；参考：《化工学报》2017年08期

【摘要】：针对电动汽车电堆的热管理系统,建立了包含71节18650型锂离子电池的电池模组的微通道液冷热模型。该模型集总处理单电池热过程、电池生热基于实测结果,模型还特别考虑了电池间导热。基于该模型,模拟研究了放电倍率、冷却液入口流速、电池间接触面积以及电池与水冷管外壁接触面积对电池模组热行为的影响。模拟结果证实了该微通道液冷方案对动力电池模组热管理的有效性,并且发现:放电倍率的增加会使电池模组内单电池温度增加、模组内温度一致性变差;增大冷却液流量可以显著降低电池模组的温度,并改善其温度一致性;增大电池间接触面积可略微提升电池模组温度一致性,但对控制其最高温度作用有限;增大电池与液冷管外壁接触面积可显著降低电池模组内电池的最高温度,但会使其温度一致性变差。
[Abstract]:Based on the thermal management system of electric vehicle stack, a model of microchannel cooling and heating was established for 71 battery modules of 18650 type lithium ion batteries. The model lumped the single cell heat process, the heat generation of the cell was based on the measured results, and the heat conduction between the cells was specially considered in the model. Based on the model, the effects of discharge rate, inlet flow rate of coolant, contact area between the battery and the outer wall of the water-cooled tube on the thermal behavior of the battery module were simulated and studied. The simulation results show that the microchannel liquid cooling scheme is effective for thermal management of power battery modules, and it is found that the increase of discharge rate will increase the temperature of single cell in the battery module, and the consistency of the temperature in the module will become worse. Increasing the flow rate of coolant can significantly reduce the temperature of the battery module and improve the consistency of the temperature, increase the contact area between the batteries can slightly enhance the consistency of the temperature of the battery module, but have limited effect on controlling the highest temperature of the battery module. Increasing the contact area between the battery and the outer wall of the liquid-cooled tube can significantly reduce the maximum temperature of the battery in the battery module, but it will make the consistency of the cell temperature become worse.
【作者单位】：广东省新能源和可再生能源研究开发与应用重点实验室中国科学院可再生能源重点实验室中国科学院广州能源研究所先进能源系统研究室;中国科学院大学;
【基金】：广东省自然科学基金-重大基础研究培育(2015A030308019) 广东省自然科学基金项目(2016A030313172) 广东省新能源和可再生能源研究开发与应用重点实验室基金项目(Y607jg1001) 中国科学院“百人计划”项目(FJ)~~
【分类号】：TM912

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