hms today ecofriendly noncorrosive traditional extinguishers secondary damage protective layer water foam reignite hours reignition danger carbon monoxide 1000c making fleet operations neutralize cool thermal runaway fire brigades ev operations ev batteries ev industry hms optionalits essential hms highvoltage ev batteries advanced fire suppression effective fire suppression ultimate fire protection ineffective water reacts burning lithiumion batteries ev battery fires extinguished latent heat hydrogen fluoride hf lithiumion battery fires electric vehicle safety dangerous chain reaction