电动汽车动力电池生热模型和散热特性

姬芬竹; 刘丽君; 杨世春; 徐斌

电动汽车动力电池生热模型和散热特性

北京航空航天大学交通科学与工程学院, 北京 100191

基金项目: 国家高技术研究发展计划资助项目（2011AA11A239）；北京市自然科学基金资助项目（3122024）

详细信息

中图分类号: U469.72
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出版历程
- 收稿日期: 2013-02-01
- 网络出版日期: 2014-01-20

Heating generation model and heat dissipation performance of the power battery in electric vehicle

School of Transportation Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 结合Bernardi生热速率模型建立了单体电池正极片集流体、负极片集流体和电池极板的热耦合模型以及成组电池传热模型；利用Fluent软件仿真分析了自然通风环境中LiFePO₄单体电池的生热特性，模拟了强制空气对流冷却条件下成组电池的生热和散热特性，分析了电池箱出风口位置对电池温度的影响；计算了不同放电倍率下电池组温度变化.计算结果表明：动力电池恒流放电末期，正、负极片的电流密度最大值出现在极耳处，正、负极耳温度高于极板温度，且正极耳温度大于负极耳温度；强制冷却条件下成组电池热特性满足安全工作温度要求；电池箱出风口位置直接影响冷却空气速度场和电池组温度场分布，出风口设置在电池箱下部有助于改善其热状态一致性.对特征点温度监控数据与仿真结果的误差小于5%，能够满足工程需要.
- 电动汽车 /
- 动力电池 /
- 热模型 /
- 冷却 /
- 温度场
Abstract: The thermal coupling models were established on the positive plate collector, the negative plate collector and the battery plate, which based on the Bernardi heat generation rate model of a single battery. The heat transfer model of battery group was founded as well. In the natural ventilation environment, the heat generation characteristics of a single battery LiFePO₄ was simulated by using Fluent software. The performances of heat generation and dissipation of battery group were simulated under the condition of forced air convection cooling. The effect of air-outlet position on battery temperature was analyzed. The effect on battery temperature was analyzed based on air-outlet position. In different discharge ratio, the battery temperature was calculated. The calculated results show that the pole ear temperature is higher than polar balde, and the postive ear temperature is greater than negative ear at the end of constant current discharging; The thermal performance of battery could meet the demands of the safe operating temperature in forced cooling conditions; The air-outlet position directly affests the air velocity profile and battery temperature field; The below air-outlet contributes to improve the consistency in thermal state. The error in calculating and testing result is less than 5% at the feature points, which could meet the needs in engineering.
- electric vehicle /
- power battery /
- thermal model /
- cooling /
- temperature field

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参考文献(13)

[1]	Sievers M, Sievers U, Mao S S.Thermal modeling of new Li-ion cell design modifications[J].Forsch Ingenieurwes, 2010, 11:9-22
[2]	Chen S C, Wan C C, Wang Y Y.Thermal analysis of lithium-ion batteries[J].Journal of Power Sources, 2005(140):111-124
[3]	辛乃龙.纯电动汽车锂离子动力电池组热特性分析及仿真研究[D].长春:吉林大学, 2012 Xin Nailong.Thermal characteristic analysis and simulation research of lithium-ion pawer battery pack for pure electric vehicle[D].Changchun:Jilin University, 2012(in Chinese)
[4]	Cosley M R, Garcia M P.Battery thermal management system[C]//IEEE, 26th Annual International Telecommunications Energy Conference.Chicago:[s.n.], 2004:38-45
[5]	蔡飞龙, 许思传, 常国峰.纯电动汽车用锂离子电池热管理综述[J].电源技术, 2012, 36(9):1410-1413 Cai Feilong, Xu Sichuan, Chang Guofeng.Thermal management techniques of lithium-ion battery pack for electric vehicles[J].Chinese Journal of Power Sources, 2012, 36(9):1410-1413(in Chinese)
[6]	Bernardi D, Pawlikowski E, Newman J.A general energy balance for battery system[J].J Electrochemical Society, 1985, 132(1):5-12
[7]	吴宏, 李育隆, 杨凯. 电动汽车电池箱通风冷却结构的研究[J].汽车工程, 2012, 34(6):556-560 Wu Hong, Li Yulong, Yang Kai.A study on the ventilation/cooling structures of battery box in electric vehicles[J].Automotive Engineering, 2012, 34(6):556-560(in Chinese)
[8]	张剑波, 卢兰光, 李哲.车用动力电池系统的关键技术与学科前沿[J].汽车安全与节能学报, 2012, 3(2):88-104 Zhang Jianbo, Lu Languang, Li Zhe.Key technologies and fundamental academic issues for traction battery systems[J].J Automotive Safety and Energy, 2012, 3(2):88-104(in Chinese)
[9]	Duan X, Naterer G F.Heat transfer in phase change materials for thermal management of electric vehicle battery modules[J].Int J Heat Mass Transf, 2010, 53(23/24):5176-5182
[10]	Mayyas A R, Omar M, Pisu P, et al. Comprehensive thermal modeling of a power-split hybrid powertrain using battery cell model[J].J Power Sources, 2011, 196(15):6588-6594
[11]	Buford K, Williams J, Simonini M.Determining most energy efficient cooling control strategy of a rechargeable energy storage system[R].2011 SAE lnternational, 2011-01-0893, 2011
[12]	Pesaran A, Burch S, Keyser M.An approach for designing thermal management systems for electric and hybrid vehicle battery packs[C]//The Fourth Vehicle Thermal Management Systems Conference and Exhibition.London:Institute of Mechanical Engineers, 1999:24-27
[13]	冯竟阳, 戴作强, 张纪鹏, 等.基于Ansys Workbench12.0的磷酸铁锂动力电池温度场特性研究[J].青岛大学学报:工程技术版, 2013, 28(1):51-55 Feng Jingyang, Dai Zuoqiang, Zhang Jipeng, et al.Research on the temperature field characteristics of LiFePO₄ power battery based on ansys workbench 12.0[J].Journal of Qingdao University:Engineering & Technology Edition, 2013, 28(1):51-55(in Chinese)