NOVELTY - The method involves monitoring the physical parameters of an energy storage unit (1) or the cells (2) of the energy storage unit. The development and the occurrence of the thermal runaway of the cells are recognized based on the monitored physical parameters of the energy storage unit using predetermined criterion. The countermeasure that counteracts the development and occurrence of the thermal runaway is performed by releasing the substance which chemically counteracts the development and occurrence of the thermal runaway by the cells under fine atomization pressure.    USE - Method for recognizing and suppressing thermal runaway of energy storage unit constructed from cells, of hybrid vehicle and electric vehicle such as motor car and passenger car.    ADVANTAGE - As the consequences of the thermal runaway of energy storage unit is actively mitigated only through the release of the substance which chemically counteracts the development and occurrence of the thermal runaway, the decontamination cost and the suppression cost of the thermal runaway of the energy storage unit are reduced. The vehicle explosion is prevented by the thermal runaway recognizing and suppressing device, thus the consequent risk of injury and death of workers is eliminated and the harmfulness to the vehicle, surrounding objects and buildings is avoided. The release of substances which chemically counteracts the development and occurrence of the thermal runaway is controlled effectively, thus the environment is prevented from contamination caused by the high temperature and long lasting of the fire.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a device for recognizing and suppressing thermal runaway of energy storage unit constructed from cells.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the device for recognizing and suppressing thermal runaway of energy storage unit.    Energy storage unit (1)    Cell (2)    Sensors (3,4)    Gas generator (6)    Reservoir (10)