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(Ni_1/3Co_1/3Mn_1/3)O₂/graphite) battery with the size of 150 × 92 × 27 mm³ was adopted to investigate the suppression efficiency of dodecafluoro-2-methylpentan-3-one (C₆F₁₂O) in high capacity lithium-ion battery fires. Five doses of C₆F₁₂O agent including 0, 0.5, 1.0, 1.5 and 2.0 kg were adopted. It was concluded that as the dose of C₆F₁₂O 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 C₆F₁₂O 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 cm³ module box, the appropriate dose of C₆F₁₂O agent was 9.42 g W^-1 h^-1. Accordingly, these results have implications in the fire suppression design for lithium-ion batteries.