重庆理工大学学报(自然科学) ›› 2023, Vol. 37 ›› Issue (12): 163-171.

• 机械材料 • 上一篇    下一篇

蜘蛛网流道扰流元设计及其对锂离子电池散热影响

尹志宏, 丁志威, 曹军磊   

  1. 昆明理工大学机电工程学院
  • 出版日期:2024-02-04 发布日期:2024-02-04
  • 作者简介:尹志宏,男,教授,主要从事机械动力学研究,E-mail:yzh_@sina.com;丁志威,男,硕士研究生,主要从事机械动力学研究,E-mail:939336428@qq.com

Design of spider web channel spoiler and its impact on heat dissipation of lithium-ion batteries

  • Online:2024-02-04 Published:2024-02-04

摘要: 为降低电池组工作温度和温差,在蜘蛛网流道内对扰流元结构进行设计,采用数值模拟方法对其冷却锂离子电池散热进行计算。对蜘蛛网流道内扰流元垂直排列和交错排列锂离子电池散热进行对比,分析扰流元直径、高度、间距和流量等参数对电池冷却散热的影响。结果表明:扰流元交错排列比垂直排列冷却电池最高温度和温差明显减小,电池模组温度分布更加均匀;扰流元直径增至6 mm,电池最高温度和温差最低,冷却液压降仅小幅增大;扰流元高度从0.5 mm增至2 mm,电池最高温度和温差呈浅“V”形变化,冷却液压降增幅较小;扰流元间距从6 mm增至15 mm,电池最高温度和温差微小增大,冷却液压降显著降低,设置扰流元流道在流量0.04 kg/s时即可满足电池冷却散热要求;合理设置扰流元结构参数,可使电池最高温度和温差降至30.64 ℃和3.62 ℃,冷却液压降为1 778.23 Pa

关键词: 锂离子电池, 蜘蛛网流道, 扰流元, 数值方法, 冷板, 散热

Abstract: Lithium-ion batteries generate huge amount of heat during charging and discharging. The accumulated heat usually leads to high battery working temperatures and big working temperature differences and thus lowers the capacity and lifespans of batteries. Even worse, it may cause fire and explosions of batteries. To reduce the working temperature and temperature difference of the battery pack, the spoiler structure is designed in the spider web channel, and the heat dissipation of cooling lithium-ion batteries is calculated by numerical methods. First, the heat dissipation of lithium-ion batteries with vertical and staggered arrangement of spoilers in spider web channel is compared, and then the impact of spoiler diameter, height, spacing and flow rate on battery cooling heat dissipation is analyzed. The results show the maximum temperature and temperature difference of the cooling battery with staggered arrangement of spoilers are markedly lower than those with vertical arrangement, and the temperature distribution of the battery module is more uniform. When the diameter of the spoiler increases to 6 mm, the batteries record the lowest maximum temperature and temperature difference, and the cooling hydraulic drop increases slightly. When the height of the spoiler increases from 0.5 mm to 2 mm, the maximum temperature and temperature difference of the batteries experience a shallow V-shaped change, and the cooling hydraulic drop increases slightly. With the increase of spoiler spacing from 6 mm to 15 mm, the maximum temperature and temperature difference of the batteries only increase slightly whereas the cooling hydraulic drop decreases significantly. The spoiler channel can meet the cooling and heat dissipation requirements of the batteries when the flow rate is 0.04 kg/s. When the structural parameters of spoilers are properly adjusted, the maximum temperature and temperature difference of the batteries are as low as 30.64 ℃ and 3.62 ℃ respectively, and the cooling hydraulic pressure drops by 1, 778.23 Pa.

中图分类号: 

  • TM 911