Research on spray cooling performance based on battery thermal management

To balance the temperature uniformity and the compactness of the battery module, the heat transfer performance of spray cooling technology is theoretically analyzed in this article. The main factors affecting the heat transfer performance of spray cooling are discussed. Through the experiments, the influence of spray cooling on the thermal management of the battery thermal management system under high discharge rate is studied. The results show that, in spray-cooling 4 + 2.5 m/s cooling mode, the total heat transfer coefficient K reaches 201.0 W/(m(2) K), which is 409.3% higher than the heat transfer coefficient of the forced air cooling. In addition, the difference between the spray concentration of the heat source surface and the spray concentration of the mainstream area during steady-state heat dissipation is an important factor affecting the heat transfer performance of spray cooling. Moreover, spray cooling can provide a lower temperature rise and a more uniform temperature distribution for the battery module. For the spray-cooling 4 + 4 m/s case, the maximum temperature rise is only 10.3 degrees C, and the temperature difference among the battery module is stably maintained within 5 degrees C. Therefore, the proposed spray cooling battery thermal management system shows to be efficient approach in handling the heat accumulation of battery module.

Automated summary

This article theoretically analyzes the heat transfer performance of spray cooling technology to achieve a balance between temperature uniformity and compactness of the battery module. The main factors affecting spray cooling's heat transfer performance are discussed. Experimental results show that spray cooling can achieve higher heat transfer coefficients, provide lower temperature rise, and more uniform temperature distribution, making it an efficient approach for managing heat accumulation in battery modules.