The experimental study on a novel integrated system with thermal management and rapid cooling for battery pack based on C6F12O spray cooling in a closed-loop

Abstract

Amongst the background of the popularization of the lithium-ion battery (LIB), the thermal issues have attracted a significant amount of attention. In the present paper, a novel integrated system is proposed with thermal management and rapid cooling based on C 6 F 12 O spray cooling in a closed loop. Through experiments using a 4 × 4 dummy 18650 cylindrical battery pack, the cooling performance of the battery thermal management system (BTMS) based on the C 6 F 12 O spray cooling is demonstrated to be effective. Further, the controllable heat generation benefits for the analysis of heat dissipation mechanisms. For the condition of 6 cm spray height with 2.05 g/s flow rate, the heat is taken away by the liquid film accounted for around 30% of the total heat dissipation, while that of direct spray cooling accounted for around 70%. In the rapid cooling experiment, compared with the blank experiment, the thermal runaway maximum temperature significantly decreased by 517.1 °C and the thermal runaway of the first battery is delayed by 229 s. Owing to the significantly effective heat removal ability of C 6 F 12 O spray cooling, the propagation of the thermal runaway is cut off. • A novel integrated system with thermal management and rapid cooling is proposed. • The effects of spray height, flow rate, and heat generation are explored. • The effectiveness of the proposed management system is proved experimentally. • The propagation of thermal runaway is cut off with the application of spray cooling.