摘要
本文以圆柱形三元材料锂离子电池作为对象,采用了实验与仿真相结合的方法研究了电池的放电性能。在实验中,分析了放电倍率对电池放电性能的影响,以及电池剩余容量(SOC)与电池内阻之间的关系,并结合测量得到的内阻数据,拟合出函数关系R_(total)(SOC,T),从而完善了锂离子电池生热速率公式。在单体电池仿真模型的基础上,进一步将单体电池集成为模块,并对模块在串行通风和并行通风情况下的温度场分布进行了仿真计算。仿真结果表明,并行通风条件下的电池模块散热能力较好,在2C放电倍率、2 m/s风速下,电池模块最大温差可以保持在5℃以内,但电池表面最高温度超过50℃。
In this paper,cylindrical ternary lithium-ion battery is taken as the object,and the discharge performance of the battery is studied by combining experiment and simulation.In the experiment,the influence of discharge ratio on battery discharge performance and the relationship between battery residual capacity(SOC)and battery internal resistance are studied,and the function relation R_(total)(SOC,T)is fitted in combination with the measured internal resistance data,thus perfecting the heat generation rate formula of lithium-ion batteries.On the basis of the single cell simulation model,the single cell is further integrated into a module,and the temperature field distribution of the module under the condition of serial ventilation and parallel ventilation is simulated.The simulation results show that the heat dissipation capacity of the battery module under the condition of parallel ventilation is better.Under the condition of 2C discharge rate and 2 m/s wind speed,the maximum temperature difference of the battery module can be kept within 5℃,but the maximum temperature of the battery surface is more than 50℃.
作者
刘业凤
王君如
华正豪
LIU Yefeng;WANG Junru;HUA Zhenghao(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,Shanghai 200093,China)
出处
《制冷技术》
2022年第3期68-74,共7页
Chinese Journal of Refrigeration Technology
关键词
锂离子电池
放电性能
电池模型
电池内阻
Lithium-ion battery
Discharge performance
Battery model
Battery internal resistance
作者简介
刘业凤(1973-),女,教授,博士。研究方向:制冷空调新技术。联系地址:上海市杨浦区军工路516号上海理工大学,邮编200093。联系电话:13918351573。E-mail:yfliu209@163.com。
