锂离子电池电-热耦合模型分析及其温度场仿真研究
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摘要
锂离子电池由于放电过程产生大量的热,不可避免的使得电池温度升高。研究大倍率放电时的电池温升,忽略电化学反应热,进一步简化原有的生热模型。为了得到电池温度分布,从电池内部结构出发,根据电流密度在集流板上的分布以及极耳处的收缩/扩散效应,分析集流板上电流密度的分布规律,从而建立电池的电-热耦合模型。通过生热模型模拟电池放电过程的温升现象,并与实验结果对比,发现模拟结果与实验结果能够很好地吻合。文章给出了电池在不同放电倍率条件下放电终了时的温度分布图,并解释了造成这种分布现象的原因。
Li-ion battery generates lots of heat during the discharge process resulting in inevitable temperature rise.The electrochemical heat could be ignored at high discharge rate,so the heat model can be simplified.In order to obtain the distribution of temperature,the inner construction of battery should be studied.By study of the current density in the current collector and the current shrink/diffusion effect near the tab,current distribution in the current collector is obtained,so the electro-thermal model of battery can be established.The discharge process was simulated and the results fit the experimental date well.The temperature distribution in battery from simulation at the end of discharge is shown and discussed.
Li-ion battery generates lots of heat during the discharge process resulting in inevitable temperature rise.The electrochemical heat could be ignored at high discharge rate,so the heat model can be simplified.In order to obtain the distribution of temperature,the inner construction of battery should be studied.By study of the current density in the current collector and the current shrink/diffusion effect near the tab,current distribution in the current collector is obtained,so the electro-thermal model of battery can be established.The discharge process was simulated and the results fit the experimental date well.The temperature distribution in battery from simulation at the end of discharge is shown and discussed.
引文
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[16]郝文广,王建平,王志强,等.聚合物锂离子电池大倍率放电温度场分析[J].鱼雷技术,2013,21(5):360-363.HAO Wen-guang,WANG Jian-ping,WANG Zhiqiang,et al.Analysis of temperature field of polymer lithium-ion battery under discharge of high-ratio-current[J].Torpedo Technology,2013,21(5):360-363.(in Chinese)
[17]BERNARDI D,PAWLIKOWSKI E,NEWMAN J.A general energy balance for battery systems[J].Journal of the Electrochemical Society,1984,132(1):5-12.
[2]曹昌胜.混合动力电动汽车电池包热特性研究与优化[D].合肥:合肥工业大学,2013.CAO Chang-sheng.Thermal Characteristics Research and Optimization of Battery Pack for Hybrid Electric Vehicle[D].Hefei:University of Technology,2013.(in Chinese)
[3]KIM U S,SHIN C B,KIM C.Effect of electrode configuration on the thermal behavior of a lithiumpolymer battery[J].Journal of Power Sources,2008,180(2):909-916.
[4]靳鹏超.新能源汽车用锂离子电池组热管理系统的研究[D].天津:天津大学,2013.JIN Peng-chao.Research on Thermal Management System of Lithium-ion Battery Pack for New Energy Vehicles[D].Tianjin:Tianjin University,2013.(in Chinese)
[5]康海鹏.锂离子动力电池生热特性分析及其选配[D].长春:吉林大学,2014.KANG Hai-peng.The Analysis of Lithium-ion Battery Thermal Behavior and Series Selection[D].Changchun:Jilin University,2014.(in chinese)
[6]YE Y,SAW LH,SHI Y,et al.Numerical analyses on optimizing a heat pipe thermal management system for lithium-ion batteries during fast charging[J].Applied Thermal Engineering,2015,86:281-291.
[7]KWON K H,SHIN C B,KANG T H,et al.A two-dimensional modeling of a lithium-polymer battery[J].Journal of Power Sources,2006,163(1):151-157.
[8]姬芬竹,刘丽君,杨世春,等.电动汽车动力电池生热模型和散热特性[J].北京航空航天大学学报,2014,40(1):18-24.JI Fen-zhu,LIU li-jun,YANG Shi-chun,et al.Heating generation model and heat dissipation performance ofthe power battery in electric vehicle[J].Journal of Beijing University of Aeronautics and Astronautics,2014,40(1):18-24.(in chinese)
[9]宋士刚,李小平.电动汽车锂离子电池释热机理及电热耦合模型[J].电源技术,2016,40(2):280-282.SONG Shi-gang,LI Xiao-ping.Calorific mechanism and electro-thermal coupling model of lithiumionbatteries for electrical vehicles[J].Chinese Journal of Power Sources,2016,40(2):280-282.(in Chinese)
[10]YAZDANPOUR M,TAHERI P,MANSOURI A,et al.A circuit-based approach for electro-thermal modeling of lithium-ion batteries[C]//Thermal Measurement,Modeling&Management Symposium(SEMI-THERM),San Jone,CA,2016:113-127.
[11]YAZDANPOUR M,TAHERI P,MANSOURI A,et al.A distributed analytical electro-thermal model for pouch-type lithium-ion batteries[J].Journal of the Electrochemical Society,2014,161(14):A1953-A1963.[J].
[12]刘霏霏,兰凤崇,陈吉清.基于动态内热源特性的车用锂离子动力电池温度场仿真及试验[J].机械工程学报,2016,52(8):141-151.LIU Fei-fei,LAN Feng-chong,CHEN Ji-qing.Simulation and experiment on temperature field of lithium-ion powerbattery for vehicle based on characteristic of dynamic heat source[J].Journal of Mechanical Engineering,2016,52(8):141-151.(in chinese)
[13]TAHERI P,MANSOURI A,YAZDANPOUR M,et al.Theoretical analysis of potential and current distributions in planar electrodes of lithium-ion batteries[J].Electrochimica Acta,2014,133(133):197-208.
[14]TAHERI P,YAZDANPOUR M,BAHRAMI M.Transient three-dimensional thermal model for batteries with thin electrodes[J].Journal of Power Sources,2013,243(243):280-289.
[15]张云云,白洁,张国庆.大倍率放电时电动汽车用锂离子电池的热性能[J].汽车安全与节能学报,2015,6(1):97-101.ZHANG Yun-yun,BAI Jie,ZHANG Guo-qing.Electrical and thermal performances of lithium-ion battery for electric vehicle at high discharge rate[J].Journal of Automotive Safety and Energy,2015,6(1):97-101.(in Chinese)
[16]郝文广,王建平,王志强,等.聚合物锂离子电池大倍率放电温度场分析[J].鱼雷技术,2013,21(5):360-363.HAO Wen-guang,WANG Jian-ping,WANG Zhiqiang,et al.Analysis of temperature field of polymer lithium-ion battery under discharge of high-ratio-current[J].Torpedo Technology,2013,21(5):360-363.(in Chinese)
[17]BERNARDI D,PAWLIKOWSKI E,NEWMAN J.A general energy balance for battery systems[J].Journal of the Electrochemical Society,1984,132(1):5-12.