化工学报 ›› 2021, Vol. 72 ›› Issue (S1): 170-177.DOI: 10.11949/0438-1157.20201569

• 流体力学与传递现象 • 上一篇    下一篇

电动汽车电池冷却器换热性能

马秋鸣1(),聂磊1,潘权稳1(),山訸1,曹伟亮2,王强2,王如竹1   

  1. 1.上海交通大学机械与动力工程学院,上海 200240
    2.上海欧菲滤清器有限公司,上海 201702
  • 收稿日期:2020-11-03 修回日期:2021-01-11 出版日期:2021-06-20 发布日期:2021-06-20
  • 通讯作者: 潘权稳
  • 作者简介:马秋鸣(1989—),男,博士,助理研究员,qiuming.ma@sjtu.edu.cn
  • 基金资助:
    国家自然科学基金创新群体项目(51521004)

Heat exchange performance of a battery chiller for electric vehicles

MA Qiuming1(),NIE Lei1,PAN Quanwen1(),SHAN He1,CAO Weiliang2,WANG Qiang2,WANG Ruzhu1   

  1. 1.Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China
    2.Research & Development China, UFI FILTERS S. p. A. , Shanghai 201702, China
  • Received:2020-11-03 Revised:2021-01-11 Online:2021-06-20 Published:2021-06-20
  • Contact: PAN Quanwen

摘要:

电动汽车中电池组的热管理对汽车的性能和安全性十分重要。通常使用小型电池冷却器(chiller)与车载空调系统的蒸发器并联,用来冷却电池冷却板中的冷却液。为了对实际电池冷却器的换热性能进行评估和分析,设计搭建了一套完整的试验测试系统,并验证了其测试的稳定性和重复性。在此基础上,对最新设计的小型紧凑电池冷却器进行了不同工况下的性能测试和分析,得到了其换热功率和流阻随冷媒侧和冷却液侧参数改变的变化规律,最高换热功率达到了5.6 kW。

关键词: 电动汽车热管理, 电池冷却器, 试验测试系统, 压缩机, 蒸发, 传热

Abstract:

The thermal management of the battery pack inside an electric vehicle is crucial to its safety and performance. Usually, a small and compact chiller with internal turbulence-generating structure is installed in parallel with the evaporator of the vehicle air-conditioning system, so as to cool down the coolant that circulates in the battery cooling plate. However, the establishment of specific testing facilities for the chiller and its experimental analyses have seldom been seen in the literature. In order to provide a steady and reliable chiller performance testing platform and to evaluate and analyze the heat exchanging capacity of a newly-designed chiller, a complete experimental system was thoroughly designed and established, and its stability and repetitiveness were then validated. Based on such a testing facility, the small chiller for the battery coolant was experimentally tested under different working conditions, and its heat exchanging performance and pressure drops were analyzed against the variations of the parameters of both refrigerant side and coolant side. Results reveal that the evaporating pressure of the refrigerant possesses bigger impact on the heat exchange than the superheated temperature at the outlet, and the pressure drop of the refrigerant always has similar trend with the heat exchanging capacity. On the coolant side, the inlet temperature and flowrate both have positive influence on the heat exchange. Finally, the highest heat exchanging capacity reached 5.6 kW, and the calculated efficiency of the compressor varied between 0.6 and 0.8.

Key words: thermal management of electric vehicles, chiller, experimental testing system, compressor, evaporation, heat transfer

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