Safety state estimation method and system for energy-storable lithium ion battery

The invention provides a safety state estimation method and system for an energy-storable lithium ion battery. The method comprises the following steps: determining an influence factor set influencing the safety state of the battery; according to the influence factor set, a safety critical value corresponding to each influence factor in the influence factor set is obtained, and the safety critical value represents a corresponding numerical value when a certain influence factor enables the battery to enter an unsafe state from a safe state; constructing a battery safety degree evaluation formula corresponding to each influence factor based on the safety critical value corresponding to each influence factor; obtaining a current numerical value corresponding to each influence factor, and calculating the safety degree corresponding to each current influence factor of the battery according to the battery safety degree evaluation formula; and comprehensively evaluating the safety state of the battery according to t