Fire suppression scheme of electrochemical storage tank = detection and alarm system (very early advance detection) + fire extinguishing system of electrochemical storage tank (spray perfluorohexanone several times to prevent reignition and fire extinguishing, spray fine water mist at a later stage to cool the cabin and prevent fire spreading). The scheme is composed of a detection and alarm system and an electrochemical storage tank fire extinguishing system. The detection and alarm system is mainly composed of a lithium battery special compound detector, fire host, cable, etc. The fire extinguishing system of the electrochemical storage tank consists of a fire suppression device (containing water mist and perfluorohexanone), a sprinkler head, solenoid valve, pipe network, etc.