纯电动汽车不同行驶工况下电池组的温升研究_李仲兴.pdfVIP

50 16 Vol.50 No.16 2 0 1 4 8 JOURNAL OF MECHANICAL ENGINEERING Aug. 2 0 1 4 DOI 10.3901/JME.2014.16.180 (212013) FLUENT 2030 FLUENT U463 Temperature Study of Pure Electric Vehicles Battery Pack at Different Driving Conditions LI Zhongxing LI Ying ZHOU Kongkang PAN Chaofeng HE Zhigang (School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013) Abstract The LiFePO battery pack are taken as an example for the study temperature of pure electric vehicles battery pack at 4 different driving conditions. Based on the Fourier’s law and the law of conservation of energy, the mathematical and finite element model and thermal conductivity of the battery pack are developed. By using FLUENT, the temperature distribution and the distribution of the flowing field of lithium-ion battery pack in a closed box are simulated when electric vehicle running at different constant speeds. Vehicle test is conducted to find the temperature distribution of measuring points in battery pack under different running conditions. The validation of simulation model is testified by proving that there is a good consistence between simulation and test results. Meanwhile, the influence imposed by different running speeds on the rising temperature of battery pack is found. Based on the authenticated simulation model verified by test results, the influence of the ambient temperature and the gradient of the road on rising temperature of lithium-ion battery pack is simulated and analyzed. The optimized operational