Method and device for predicting service life of vehicle battery bracket and vehicle

The invention discloses a service life prediction method and device for a vehicle battery bracket and a vehicle, and belongs to the technical field of vehicle detection, and the service life prediction method comprises the steps: obtaining the material characteristics of the battery bracket, and obtaining the strain parameters of a detection point of the battery bracket based on a strain sensor; the strain parameters are preprocessed; determining a life prediction model corresponding to the current state of the detection point based on material characteristics and the preprocessed strain parameters; determining the total fatigue life of the detection point based on the strain parameters, the material characteristics and a life prediction model; determining the active fatigue life of the detection point based on the rain flow counting module and the strain parameters; and determining the residual life state of the detection point based on the total fatigue life, the active fatigue life and a preset value. By a