Power battery fire extinguishing system and method

The embodiment of the invention discloses a power battery fire extinguishing system and method. The fire extinguishing system comprises a detection module, a control module and a fire extinguishing module. The detection module is used for collecting a plurality of environmental data in a battery compartment, and determining a target fire level according to the multiple environmental data in case of a fire judged; the control module is used for generating a target fire extinguishing instruction according to the target fire level, and sending the target fire extinguishing instruction to the fireextinguishing module; and the fire extinguishing module is used for switching to a target fire extinguishing mode corresponding to the target fire level according to the target fire extinguishing instruction, and putting out the fire. According to the power battery fire extinguishing system provided by the embodiment of the invention, through division of the fire behavior is divided into different target fire levels, the