The compressed air foam was used as the fire extinguishing agent to carry out experiments. Through theoretical analysis and physical fire tests, the extinguishment and anti reburning properties of compressed air foam for fighting lithiumion battery fires were studied. The test results show that the compressed air foam can quickly extinguish the lithium-ion battery fire, keep the temperature down, and absorb the combustible gas. Long term immersion in the wrapped lithium- ion battery can effectively resist the re ignition. The results of shortterm and long- term are analyzed and compared, and the longterm effective length of time can reach more than 48 h.

compressed air foam, lithium-ion battery fire, antireignition, thermal runaway