摘要
根据传热学的质量、动量和能量守恒定律建立了锂离子电池包的三维非稳态导热模型。采用计算流体力学(CFD)软件,对电动汽车匀速行驶且自然风冷时锂离子电池包的流场和温度场进行了数值模拟,并进行了纯电动匀速行驶时电池包的温度场测试。结果发现,模拟结果与测试结果具有较好的一致性,从而表明所建流场和温度场模型的合理性。在此基础上,对锂离子电池包散热系统的优化方案并进行了数值模拟。结果表明,优化方案可实现锂离子电池包的良好散热,使温度升幅和电池之间的温差有效降低,从而满足电动汽车对电池包的使用要求。
A three-dimensional, transient heat dissipation model was built for Lithium-ion battery package, based on the mass, momentum and energy conservation equations. With the help of the computational fluid dynamics （CFD） software, the model is applied to simulate numerically flow field and temperature field of the Lithium-ion battery packages when Electric Vehicle（EV） works under the uniform speed and natural air cooling situation. A temperature measurement experiment of the battery package with uniform speed and the simulation results consist well with the experimental data,which confirms the rationality of the model of the flow field and temperature field. An optimal scheme of heat dissipation is proposed and its simulation results of thermal performance are obtained. It indicates that the optimal scheme improves the ther- mal performance and decreases the temperature rise and temperature disuniformity among the batteries effectively, thus show that the optimal heat dissipation scheme of the battery package can satisfy the application requirements in EV.
出处
《世界科技研究与发展》
CSCD
2012年第6期923-926,共4页
World Sci-Tech R&D
基金
重庆科技攻关计划项目(CSTC
2010AA6046)资助
关键词
锂离子电池
电动汽车
温度场
仿真优化
CFD
FLUENT
lithium-ion battery
battery electric vehicles
temperature field
simulation and optimization
CFI3
FLUENT
