GUO Y Y, ZHOU L, ZHANG S M,et al.Numerical simulation of air-cooled temperature field of cylindrical lithium-ion battery and module[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(6):145-154.

doi:10.16186/j.cnki.1673-9787.2021030080

Received:2021/03/24

Revised:2021/06/18

Published:2022/11/25

Numerical simulation of air-cooled temperature field of cylindrical lithium-ion battery and module

GUO Yingying, ZHOU Long, ZHANG Sumei, WEN Xiaoping

School of Mechanical and Power Engineering，Henan Polytechnic University，Jiaozuo 454000，Henan，China

Abstract:In order to realize better thermal management of lithium-ion battery，numerical simulation analysis of air-cooled temperature field was performed on lithium-ion battery.According to the different positions and directions of the air inlet and outlet，the structures of 18 groups of battery modules were designed，CFD software was used to analyze the heat dissipation effect of the temperature field under different conditions for 18650 single lithium-ion battery and battery modules.The results showed that the variation trends of the single lithium-ion battery test and simulation values were consistent，and the relative error did not exceed 5%.Under the same simulation conditions，the single-layer battery module inlet and outlet layout on the same side was better than the opposite side layout，and the horizontal layout of the inlet and outlet was better than the vertical layout，the double-layer battery module inlet and outlet layout on the same side was better than the opposite side layout，and the vertical layout of the inlet and outlet was better than the horizontal layout，the optimal model was D1.When the D1 air duct spacing was 4 mm，the maximum temperature，average temperature，maximum temperature difference and consistency coefficient were 305.30，304.29，2.20 K and 0.72% respectively，and the heat dissipation effect and uniformity of the battery module temperature field were the best.When the inlet wind speed increased from 0.5 to 5 m/s，the temperature indexes dropped by 12.53，11.36，3.21 K and 1% respectively.When the inlet wind speed exceeded 3 m/s，the temperature indexes of the temperature field decreased slowly.The heat dissipation effect of the temperature field was not obvious.The numerical simulation of the air-cooled temperature field of lithium-ion batteries and modules had important reference value in practical applications and could provide a guiding basis for battery thermal management system.

Key words:lithium-ion battery;air-cooled;temperature field;air position;distance between air ducts;inlet wind speed

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