Study on heat transfer characteristics of honeycomb liquid-cooled lithium battery module

To ensure that a lithium battery can operate in the appropriate temperature range, the 18650-type lithium battery (cylindrical battery with diameter of 18 mm and height of 65 mm) was selected as the research object, and the thermal model of single battery was established. Compared with reference values, the data correlate well and the accuracy of the model is validated. The liquid-cooling model of a honeycomb lithium battery module was established based on a thermal model of a single battery. By using numerical simulation, the coolant flow rate, coolant temperature and central angle of coolant channel are set as variables to analyze the heat transfer characteristics of the battery module at different ambient temperature. The results show that (1) Increasing the flow rate and the central angle of the coolant channel can improve the temperature homogeneity. Compared with the flow rate, the central angle has a greater effect on the heat transfer characteristics. (2) The coolant temperature has a significant effect on the temperature distribution of the battery module. However, the temperature homogeneity is deteriorated.