Fuente: Wipo "precision agriculture" The invention discloses an early warning method, a safety control method, a safety control device and equipment for an electrochemical energy storage system. The method comprises the following steps: acquiring the battery cell temperature and the battery cell voltage of each battery cell to be detected; according to the battery cell temperature and the battery cell voltage, obtaining a plurality of characteristic quantities of each to-be-measured battery cell; based on the thermal runaway boundary conditions, the multiple characteristic quantities are combined and judged, early warning information is obtained, and the early warning information is used for indicating the thermal runaway state of the electrochemical energy storage system. The multiple characteristic quantities and the thermal runaway boundary conditions are used for combined judgment, accurate early warning of thermal runaway can be conducted on the electrochemical energy storage system, and the safety and reliability of the system are improved.