Experimental study on the efficiency of dodecafluoro-2-methylpentan-3-one on suppressing lithium-ion battery fires.

Currently, the effective and prompt suppression of lithium-ion battery fires is still challenging. Herein, a 38 A h prismatic ternary (Li(NiCoMn)O/graphite) battery with the size of 150 × 92 × 27 mm was adopted to investigate the suppression efficiency of dodecafluoro-2-methylpentan-3-one (CFO) in high capacity lithium-ion battery fires. Five doses of CFO agent including 0, 0.5, 1.0, 1.5 and 2.0 kg were adopted. It was concluded that as the dose of CFO agent increased, the peak temperature of the long surface and bottom of the cells first increased slowly and then decreased rapidly. The results indicated that the CFO agent first shows a negative inhibitory effect, which is then transformed into an inhibitory effect as the dose increases. This inhibitory effect grew distinct gradually with an increase in dose. It was found that in a 47.5 × 21.5 × 16 cm module box, the appropriate dose of CFO agent was 9.42 g W h. Accordingly, these results have implications in the fire suppression design for lithium-ion batteries.