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| Simulation Analysis of Heat Transfer in Cooling System of Li-ion Battery Pack for Vehicles |
| Received:July 18, 2020 Revised:August 15, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.02.002 |
| KeyWord:electric vehicle Li-ion battery cooling system CFD heat transfer simulation analysis |
| Author | Institution |
| LI Wang |
School of Mechanical Engineering,Chengdu , China |
| LU Yao-hui |
School of Mechanical Engineering,Chengdu , China ;Engineering Research Center of Advanced Driving Energy-saving Technology, Ministry of Education, Southwest Jiaotong University, Chengdu , China |
| LI Zhen-sheng |
School of Mechanical Engineering,Chengdu , China |
| LIAO Hong |
School of Mechanical Engineering,Chengdu , China |
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| Abstract: |
| To solve the safety and thermal runaway problem of the lithium-ion battery pack of electric vehicle under high temperature, the three-dimensional analysis model of lithium-ion battery cooling system is established. The computational fluid dynamics (CFD) method is applied to simulate and analyze the battery pack with the theory of heat transfer and convection. The temperature field distribution of lithium-ion battery packs is basically the same, with the characteristics of low in the middle and high on both sides, and changed level. The lower the coolant temperature is, the lower the maximum temperature of the battery pack is; the higher the coolant inlet flow rate is, the lower the maximum temperature inside the battery pack is; the cooling plate material has little effect on the cooling effect of the battery pack. For aluminum alloy cooling plate, the cooling effect of the battery pack is the best when the temperature of the coolant is 20 ℃ and the inlet flow rate is 2 m/s. For the cooling system designed in this paper, the change of coolant inlet flow rate and cooling plate material has little effect on the cooling effect of the battery pack, while the change of coolant inlet temperature has great effect on the cooling effect of the battery pack. Therefore, reasonable inlet temperature and flow rate of coolant should be selected, and aluminum alloy should be selected as cooling plate material to meet lightweight requirement, prevent excessive cooling of battery pack, reduce resistance loss in flow channel and improve cooling efficiency of cooling system. |
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