Fire-fighting device and method based on extremely early gas detection and BMS break variable criterion

According to the fire fighting device and method based on extremely early gas detection and BMS break variable criterion, in a liquid cooling integrated cabinet, a battery pack control management unit transmits BMS break variable to a relay module; each module all-in-one detector and the cabinet-level all-in-one detector transmit a gas detection result to the relay module; the relay module carries out comprehensive judgment according to the BMS break variable and a gas detection result and communicates with the fire extinguishing suppression host according to a judgment result, the fire extinguishing suppression host controls the pump set to be started, meanwhile, the relay module controls the cabinet-level partition selection valve and the module partition selection valve to be opened, and a fire extinguishing agent in the tank body is sprayed out of the cabinet-level spray head through a main pipeline. And the water is sprayed from each module nozzle through a branch pipeline, so that fire extinguishment in