Research on battery thermal management system based on liquid cooling plate with honeycomb-like flow channel

In previous studies, researchers have been working to find a way to increase the heat exchange area of the flow channels in the liquid cooling plate (LCP), to improve the heat dissipation performance of the LCP. In this paper, an LCP with a honeycomb structure (HLCP) is designed based on prismatic batteries. The dense honeycomb channels significantly increase the heat exchange area of the cooling channels. Taking the structural parameters of HLCP and the coolant flow velocity as variables, corresponding models are established for numerical simu-lation. The results show that the optimal structural parameters are: the width of the cooling channel is 3 mm, and the vertical distance from the center of the regular hexagonal aluminum block to its side length is 6.8 mm. When the inlet velocity is set to 0.1 m/s and the thickness of HLCP is 3 mm, the maximum temperature and maximum temperature difference of the battery are 302.5 K, 4.1 K, respectively. And the pressure drop in a single HLCP is 122.4 Pa. When the inlet velocity exceeds 0.3 m/s, the improvement in cooling performance is not significant. In addition, the temperature uniformity of the battery module can be improved by adopting a scheme in which the coolant flows in opposite directions in two adjacent HLCPs.

Automated summary

In this study, a liquid cooling plate (LCP) with a honeycomb structure (HLCP) was designed to increase the heat exchange area of the cooling channels and improve the heat dissipation performance. The optimal structural parameters and the effect of different coolant flow velocities were investigated. The results showed that beyond a certain inlet velocity, the improvement in cooling performance was not significant.