干年妃?覮,孙长乐,刘东旭,雷富强.变接触面液冷系统的电池模组温度一致性研究[J].湖南大学学报:自然科学版,2020,(6):34~42
变接触面液冷系统的电池模组温度一致性研究
Study on Temperature Consistency of Battery Module for Liquid Cooling System with Variable Contact Surface
  
DOI:
中文关键词:  锂离子电池  电池热管理  液冷  变接触面  温差
英文关键词:lithium ion battery  battery thermal management  liquid cooling  variable contact surface  temperature difference
基金项目:
作者单位
干年妃?覮,孙长乐,刘东旭,雷富强 (湖南大学 汽车车身先进设计制造国家重点实验室湖南 长沙 410082) 
摘要点击次数: 34
全文下载次数: 22
中文摘要:
      为了使电池系统单体间的温度具有较好的一致性,设计了一种在单体间隙中填充铝柱的液冷热管理系统,建立了单体的电化学-热耦合模型,对比研究了不同入口流速、不同截面边长和高度组合的铝柱液冷系统对电池热性能的影响. 研究结果表明,截面边长和高度梯度变化的铝柱液冷系统的冷却性能和单体间的温度一致性都要优于截面边长和高度为定值的系统. 在放电倍率为3 C,入口流速为0.10 m/s时,此组合方式下电池模块中单体间的最大温差保持在3.72 ℃以内,满足电池系统热管理的需求. 最后,针对此模型对不同放电倍率进行了仿真验证,结果显示单体间温度具有较好的一致性.
英文摘要:
      It is far more difficult to reduce the temperature differences among cells in a battery module than to reduce the maximum temperature of module. In order that the cells can have better temperature distributing conformity, this paper designed a liquid cooling thermal management system by packing aluminum column in the gaps among the cells and set up an electrochemical-thermal coupling model for the cells. Comparative study of the impacts on the thermal properties of the cells exerted by liquid cooling system of aluminum columns under the combination modes of different entrance velocity,different section length and height was also conducted. The results indicated that the cooling performance of the aluminum column liquid cooling system with gradient variation of cross-section length and height and the temperature distributing conformity among the cells were better than those with the fixed values of section length and height. Under the condition that the discharge rate was 3C and the entrance velocity was 0.1 m/s,the maximum temperature difference among the cells in the module group based on the proposed coupling model was kept within 3.72 ℃,meeting the requirements of thermal management of the battery system. Finally, different discharge rates were verified through the simulation based on this model, indicating that the cells had better temperature distributing conformity.
查看全文  查看/发表评论  下载PDF阅读器
关闭