The microchannel liquid cooling tube is primarily designed to increase the contact area with the liquid, minimizing the thermal resistance between the cold plate and the heat source to enhance cooling performance and increase structural strength. Serpentine tubes are more suitable for cylindrical cell liquid cooling heat transfer solutions.
This is due to the fact that the pressure drop was minimized by widening the cooling path, while maintaining the same flow rate. As the channel width of the cooling plate increased, the average temperature of the battery module decreased; however, the temperature difference between the upper and lower parts of the module increased. Figure 5.
With the increasing application of the lithium-ion battery, higher requirements are put forward for battery thermal management systems. Compared with other cooling methods, liquid cooling is an efficient cooling method, which can control the maximum temperature and maximum temperature difference of the battery within an acceptable range.
Orthogonal analysis was conducted to investigate the influence of each variable on the cooling performance of the battery module. It was confirmed that increasing the number of channels was the most effective method for improving the cooling performance and reducing the pumping power.
Mohammadian et al. proposed an internal cooling system, in which the electrolyte acts as a coolant through the microchannel between the positive and negative electrodes of the battery, as shown in Figure 13 a.
The location of the cold plate, the contact area between the cooling structure and the battery, the number of cooling channels, and the coolant flow rate have an important influence on the cooling performance of the system. According to the position of the cold plate, it can be divided into bottom cooling and side cooling.
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