Optimization of the active battery immersion cooling based on a self-organized fluid flow design

The liquid cooling system plays a vital role in reducing maximum temperature and temperature non-uniformity for batteries. Among various thermal management approaches for Li-ion batteries, the immersion cooling scheme is attractive due to its thermal homogeneity. This paper investigated a self-organized fluid flow design for immersion cooling. It dexterously takes the advantage of the cylindrical battery's structure to form a net-like flow. Applying an interdigitated manifold system and checkerboard topology, the flow distribution of immersion cooling and inherently the thermal performance of batteries are improved. Results show that, with the increase of the charge and discharge rate, the advantage of arranging the inlet and outlet at the same-side outstands. A strategy coupling single-factor analysis with the orthogonal test is proposed to analyze the influencing factors. With the use of the optimal model, the maximum temperature and temperature difference are decreased by 12.56 % and 43.81 %, respectively. At 5.844C discharge rate, only 3.86 K temperature difference and 305.09 K maximum temperature are achieved with a pressure drop of 8.89 Pa. A 17 batteries module of the optimal design also indicates that the self-organized immersion cooling can effectively improve the thermal performance of batteries.

Automated summary

This paper investigates a self-organized fluid flow design for immersion cooling, which effectively improves the thermal performance of batteries. By applying an interdigitated manifold system and checkerboard topology, the flow distribution of immersion cooling is further enhanced.