锂离子动力电池成组设计及其优化分析
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摘要
工作温度是影响电动汽车动力电池工作效率和安全性能的主要因素之一,对动力电池进行结构成组设计并将其工作温度控制在一定范围,是电池组热管理的核心任务。文章提出了一种新型内部气流双向循环交错排列的动力电池成组结构,设计了多种电池排列方案,并综合运用一维流体系统计算方法和三维计算流体动力学(computational fluid dynamics,CFD)仿真方法,确定了电池组最佳排列方案、合适的加热与冷却功率以及风扇正反转工作周期。计算结果表明,该方案能够满足不同工况下动力电池的工作温度范围要求,并能将单体电池最大温差控制在9℃以内。
The working temperature is one of the key factors which affect the efficiency and safety performance of electric vehicle power batteries,so the core object of battery thermal management is to control the temperature of the batteries within certain range through designing the structure of battery pack.In this paper,a new staggered layout of power batteries with interior air bidirectional circulation was presented,and multiple structure schemes of battery pack were designed.The optimum arrangement scheme of battery pack,the suitable heating and cooling power,and the appropriate positive and inverse working cycle of fan were determined by synthetically using one-dimensional fluid system calculation method and three-dimensional computational fluid dynamics(CFD)simulation tool.And the optimization results show that the scheme of power batteries can meet the temperature requirements under different working conditions,and the maximum temperature difference of batteries can be controlled within 9℃.
The working temperature is one of the key factors which affect the efficiency and safety performance of electric vehicle power batteries,so the core object of battery thermal management is to control the temperature of the batteries within certain range through designing the structure of battery pack.In this paper,a new staggered layout of power batteries with interior air bidirectional circulation was presented,and multiple structure schemes of battery pack were designed.The optimum arrangement scheme of battery pack,the suitable heating and cooling power,and the appropriate positive and inverse working cycle of fan were determined by synthetically using one-dimensional fluid system calculation method and three-dimensional computational fluid dynamics(CFD)simulation tool.And the optimization results show that the scheme of power batteries can meet the temperature requirements under different working conditions,and the maximum temperature difference of batteries can be controlled within 9℃.
引文
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[9]宋军,夏顺礼,赵久志,等.用Icepak软件分析并验证某纯电动轿车电池热管理系统[J].汽车工程学报,2013,27(3):169-174.
[2]WANG T,TSENG K J,ZHAO J Y,et al.Thermal investigation of lithium-ion battery module with different cell arrangement structures and forced air-cooling strategies[J].Applied Energy,2014,134:229-238.
[3]YANG N X,ZHANG X W,LI G J,et al.Assessment of the forced air-cooling performance for cylindrical Lithium-ion battery packs:a comparative analysis between aligned and staggered cell arrangements[J].Applied Thermal Engineering,2015,80(4):55-65.
[4]梁小波,袁侠义,谷正气,等.运用一维/三维联合仿真的汽车热管理分析[J].汽车工程,2010,32(9):793-798.
[5]SATO N.Thermal behavior analysis of Lithium-ion batteries for electric and hybrid vehicles[J].Jour nal of Power Sources,2001,99:70-77.
[6]任保福,贾力,张竹茜,等.大容量锂离子动力电池热特性的实验研究[J].工程热物理学报,2013,34(11):2120-2123.
[7]SHAHABEDDIN K M,SEYED M R,ZHANG Y W.Thermal management improvement of an air-cooled high-power Lithium-ion by embedding metal foam[J].Journal of Power Sources,2015,296(20):305-313.
[8]JIANG C,TANG Z G,HAO J X,et al.A novel design of air-cooled battery thermal management system for electric vehicle[J].Applied Mechanics and Materials,2014,563:362-365.
[9]宋军,夏顺礼,赵久志,等.用Icepak软件分析并验证某纯电动轿车电池热管理系统[J].汽车工程学报,2013,27(3):169-174.