Electric vehicle power battery thermal runaway monitoring fire-fighting system and method based on portable fire-fighting device

The invention relates to an electric vehicle power battery thermal runaway monitoring fire-fighting system and method based on a portable fire-fighting device, the portable fire-fighting device comprises at least one injection pipe, a connecting support with moving wheels arranged at the two ends of the bottom, a tail pipe and a push rod, and the portable fire-fighting device can go deep into a vehicle chassis to conduct fire extinguishing and cooling on a power battery located on the chassis. The electric vehicle power battery thermal runaway monitoring fire-fighting system comprises the portable fire-fighting device, a battery monitoring device, a fire-fighting supercharging device and a system controller. The fire extinguishing system for monitoring thermal runaway of the power battery of the electric vehicle is used for transforming a parking space, judging whether a parked vehicle is an electric vehicle or not and whether thermal runaway happens to the power battery or not, and accurately extinguishing f