储能科学与技术

• XXXX •    

280Ah浸没式液冷电池模组流动传热策略研究

郭鹏宇1,2(), 张明杰2, 程宜风3, 马俊华2, 陈浩2, 李昌豪3, 魏斌2, 巨星1()   

  1. 1.新型储能技术北京实验室，能源动力与机械工程学院，华北电力大学，北京 102206
    2.中国电力科学研究院有限公司，北京 100192
    3.国网安徽省电力有限公司电力科学研究院，安徽省 合肥市 230601
  • 收稿日期:2025-07-22 修回日期:2025-08-25
  • 通讯作者: 巨星 E-mail:120232202486@ncepu.edu.cn;scottju@ncepu.edu.cn
  • 作者简介:郭鹏宇（2001—），男，硕士研究生，研究方向：电池高效热管理策略，E-mail：120232202486@ncepu.edu.cn；
  • 基金资助:
    国家电网公司总部科技项目(4000-202420082A-1-1-ZN)

Research On Flow Heat Transfer Strategy For 280Ah Immersion Liquid-Cooled Battery Module

Peng-yu GUO1,2(), Ming-jie ZHANG2, Yi-feng CHENG3, Jun-hua MA2, Hao CHEN2, Chang-hao LI3, Bin WEI2, Xing JU1()   

  1. 1.Beijing Laboratory of New Energy Storage Technology, School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
    2.China Electric Power Research Institute, Beijing, 100192, China
    3.State Grid Anhui Electric Power Research Institute, Anhui, Hefei, 230601, China
  • Received:2025-07-22 Revised:2025-08-25
  • Contact: Xing JU E-mail:120232202486@ncepu.edu.cn;scottju@ncepu.edu.cn

摘要：

针对传统风冷和液冷板式储能电池模组存在的模组温升过大和电池上下温度不均匀问题，设计了1并5串的280Ah浸没式液冷电池模组，开展了电池模组流动策略仿真与实验研究。研究结果表明：在模组设计及冷却液进出口选择方面，通过对比底板式和侧板式电池模组的四种冷却液进出口方式，发现采用底板式左下进右上出方式的电池模组热性能最好；在自然对流条件下电池模组均温性分析方面，发现半浸没无法改善电池本身的温度均匀性，全浸没具有最好的单体及模组均温性；在冷却液进口流量方面，发现强制流动能大幅降低模组温升，模组最高温度、温差及温升均在冷却液流量为6L/min时出现极小值，分别为30.55℃、4.15℃及5.59℃。通过对流换热系数h和冷却液带走热量Qf的分析，发现在强制流动条件下存在三个“流量区”，其中在中等流量区存在一个“最佳流量值”，使得在该流量下电池模组热性能最好。综上，本文研究的浸没式液冷电池模组最佳流动策略为：采用底板式左下进右上出的进出口方式，电池模组全浸没且进口流量设置为6L/min。

关键词: 280Ah锂离子电池, 浸没式液冷, 模组设计, 流动策略

Abstract:

Aiming at the problems of excessive temperature rise and uneven temperature distribution at the top and bottom of the battery in traditional air-cooled and liquid-cooled plate-type energy storage battery modules, a 280Ah immersion liquid-cooled battery module with 1 parallel and 5 series was designed, and simulation and experimental research on the flow strategy of the battery module were carried out. The research results show that in terms of module design and the selection of coolant inlet and outlet, by comparing the four coolant inlet and outlet methods of the bottom plate and side plate battery modules, it is found that the battery module with the bottom plate type with the left bottom inlet and right top outlet method has the best thermal performance. In the analysis of the temperature uniformity of battery modules under natural convection conditions, it was found that semi-immersion could not improve the temperature uniformity of the battery itself, while full immersion had the best temperature uniformity for both individual cells and modules. In terms of the inlet flow rate of the coolant, it was found that forced flow could significantly reduce the temperature rise of the module. The maximum temperature, temperature difference and temperature rise of the module all reached their minimum values when the coolant flow rate was 6L/min, which were 30.55℃, 4.15℃ and 5.59℃ respectively. Through the analysis of the convective heat transfer coefficient h and the heat carried away by the coolant Qf, it was found that there are three "flow zones" under forced flow conditions. Among them, there is an "optimal flow value" in the medium flow zone, which makes the thermal performance of the battery module the best at this flow rate. In summary, the optimal flow strategy for the immersion liquid-cooled battery module studied in this paper is as follows: a bottom plate type with left bottom in and right top out inlet and outlet method is adopted, the battery module is fully immersed, and the inlet flow rate is set at 6L/min.

Key words: 280Ah lithium-ion battery, Immersion liquid cooling, Module design, Flow strategy

中图分类号: