Numerical simulation of effect of heat pipe cooling device on temperature distribution in lithium-ion battery pack of vehicle

doi:10.11949/j.issn.0438-1157.20161404

Abstract

Abstract:

Too high temperature of a lithium-ion battery pack will reduce the discharge efficiency and accelerate the decay of battery life.In order to lower the temperature of the battery pack,a cooling system which inserted heat pipes among the batteries was designed.Based on the actual speed of electric vehicle,the temperature distribution of the battery pack under different speeds was numerically calculated.The results showed that the discharge current and the heat production increased sharply with the increase of vehicle speed,the discharge current reached up to 143 A at a vehicle speed of 120 km·h^-1,and the battery pack temperature exceeded 50℃ when the batteries discharged ending.Compared with the natural convection cooling system,the heat pipe cooling system made the average temperature of the battery pack reduce 4.6℃ and the temperature difference reduce 2.2℃.The temperature of battery pack was effectively reduced with the increase in length of condensation section of heat pipes.A satisfactory cooling requirement of the battery pack was obtained when the length of heat pipe condensing section was 50 mm.

Key words: lithium-ion batteries, heat pipes, numerical simulation, temperature field

摘要：

电动汽车锂离子电池温度过高会降低电池的放电效率，加速电池寿命的衰减。为了降低电池组温度，设计了热管内插于电池组的散热系统。以电动汽车实际行驶过程中的速度为依据，对不同放电电流下电池组的温度场分布进行了数值计算。结果表明：随着车速的提高，电池的放电电流、产热量急剧增加，当车速达到120 km·h^-1时，放电电流高达143 A，电池放电截止时，电池组温度达到56℃；与自然对流冷却方式相比，热管冷却可以将电池组的平均温度降低4.6℃，电池组温差降低2.2℃；热管冷凝段长度的增长可以有效地降低电池组的温度，热管冷凝段长度为50 mm时，可以基本上满足电池组的散热需求。

关键词: 锂离子电池, 热管, 数值模拟, 温度场

CLC Number:

TM911.1

WANG Jian, GUO Hang, YE Fang, MA Chongfang. Numerical simulation of effect of heat pipe cooling device on temperature distribution in lithium-ion battery pack of vehicle[J]. CIESC Journal, 2016, 67(S2): 340-347.

王建, 郭航, 叶芳, 马重芳. 热管散热装置对车用锂离子电池组内温度分布影响数值模拟[J]. 化工学报, 2016, 67(S2): 340-347.

References 20

[1]	张克宇, 姚耀春.锂离子电池磷酸铁锂正极材料的研究进展[J].化工进展, 2015, 34(1): 166-172. ZHANG K Y, YAO Y C.Research progress in LiFePO4 cathode material for lithium-ion batteries[J].Chemical Industry and Engineering Progress, 2015, 34(1): 166-172.
[2]	孟良荣, 王金良.电动车电池现状与发展趋势[J].电池工业, 2006, 11(3): 202-206. MENG L R, WANG J L.Status and developing trends of the batteries for electric vehicles[J].Chinese Battery Industry, 2006, 11(3): 202-206.
[3]	吴赟, 蒋新华, 解晶莹.锂离子电池循环寿命快速衰减的原因[J].电池, 2009, 39(4): 206-207. WU Y, JIANG X H, XIE J Y.The reason for rapid decline in cycle life of li-ion battery[J].Battery Bimonthly, 2009, 39(4): 206-207.
[4]	LIM D H, LEE W D, CHOI D H, et al.Preparation of platinum nanoparticles on carbon black with mixed binary surfactants: characterization and evaluation as anode catalyst for low-temperature fuel cell[J].Journal of Power Sources, 2008, 185(1): 159-165.
[5]	吴祯利.电动车动力电池热管理与空调系统联合仿真及控制技术研究[D].长春: 吉林大学, 2015. WU Z L.Study of co-simulation and control technology for electric vehicle battery thermal management and air conditioning systems[D].Changchun: Jilin University, 2015.
[6]	胡小峰, 鄂加强, 胡辽平, 等.基于无机超导热管的车用锂离子电池组散热性能[J].中南大学学报, 2012, 43(10): 4100-4105. HU X F, E J Q, HU L P, et al.Capacity of heat dissipation for automotive lithium ion battery based on inorganic superconductivity technology[J].Journal of Central South University, 2012, 43(10): 4100-4105.
[7]	王颖盈, 刁彦华, 赵耀华, 等.平板微热管阵列应用于锂电池组的散热特性[J].电源技术, 2014, 38(8): 1433-1436. WANG Y Y, DIAO Y H, ZHAO Y H, et al.Cooling property of flat micro-heat pipe arrays for lithium battery[J].Power Technology, 2014, 38(8): 1433-1436.
[8]	GRECO A, CAO D, JIANG X, et al.A theoretical and computational study of lithium-ion battery thermal management for electric vehicles using heat pipes[J].Journal of Power Sources, 2014, 257(3): 344-355.
[9]	WU M S, LIU K H, WANG Y Y, et al.Heat dissipation design for lithium-ion batteries[J].Journal of Power Sources, 2002, 109(1): 160-166.
[10]	MURASHKO K, PYRHONEN J, LAURILA L.Optimization of the passive thermal control system of a lithium-ion battery with heat pipes embedded in an aluminum plate[C]//15th European Conference on Power Electronics and Applications. France: IEEE Computer Society, 2013: 1-10.
[11]	YE Y H, SHI Y X, SAW L H, et al.Performance assessment and optimization of a heat pipe thermal management system for fast charging lithium ion battery packs[J].International Journal of Heat and Mass Transfer, 2016, 92(1): 893-903.
[12]	张文春, 纪峻岭, 冯樱.汽车理论[M].第2版.北京: 机械工业出版社, 2004: 40-41. ZHANG W C, JI J L, FENG Y.Automotive Theory[M].2nd ed.Beijing: Mechanical Industry Press, 2004: 40-41.
[13]	欧阳陈志.锂离子动力电池热分析及优化[D].长沙: 长沙理工大学, 2013. OUYANG C Z.Thermal analysis and optimization of lithium-ion power battery[D].Changsha: Changsha University, 2013.
[14]	王慧磊.电动汽车锂动力电池组热管理系统研究与应用[D].长春: 吉林大学, 2014. WANG H L.Research and application of thermal management system in electric vehicle lithium power battery pack[D].Changchun: Jilin University, 2014.
[15]	李策园.纯电动汽车锂动力电池组温度场特性研究及热管理系统实现[D].长春: 吉林大学, 2014. LI C Y.Research on temperature field characteristic for lithium-ion battery pack of pure electric vehicle and thermal management system implementation[D].Changchun: Jilin University, 2014.
[16]	BERNADI D, PAWLIKOWSKI E, NEWMAN J.A general energy balance for battery systems[J].Journal of the Electrochemical Society, 1985, 132(1): 5-12.
[17]	PESARANA A, BURCH S, KEYSER M.An approach for designing thermal management systems for electric and hybrid vehicle battery packs[C]//1999 Vehicle Thermal Management Systems Conference. London: Professional Engineering Publishing Ltd., 1999: 331-346.
[18]	张志杰, 李茂德.锂离子电池内阻变化对电池温升影响分析[J].电源技术, 2010, 34(2): 128-130. ZHANG Z J, LI M D.Effect of internal resistance on temperature rising of lithium-ion battery[J].Power Technology, 2010, 34(2): 128-130.
[19]	孙世梅, 张红.热管换热器传热性能及温度场数值模拟[J].化工学报, 2004, 55(3): 472-475. SUN S M, ZHANG H.Numerical simulation of thermal performance and temperature filed in heat pipe heat exchanger[J].Journal of Chemical Industry and Engineering(China), 2004, 55(3): 472-475.
[20]	汪健生, 马赫.蒸发冷凝段长度比对脉动热管性能的影响[J].化工进展, 2015, 34(11): 3846-3851. WANG J S, MA H.Influence of the ratio of evaporation section length to condensation section length on the performance of pulsating heat pipe[J].Chemical Industry and Engineering Progress, 2015, 34(11): 3846-3851.