Solid oxide fuel cell stack electrochemical performance life prediction method

The invention belongs to the technical field of solid oxide fuel cells, and particularly relates to a life prediction method for electrochemical performance of a solid oxide fuel cell stack. Comprising the following steps: defining a failure threshold value of electrochemical performance, and obtaining index requirements of corresponding voltage attenuation rate and internal resistance growth rate; acquiring change data of voltage and current required by the electrochemical performance attenuation prediction model along with operation time; establishing a polarization curve model according to the operation parameters of the galvanic pile; establishing an empirical attenuation model of the electric pile; calculating the attenuation rate and the attenuation acceleration of the galvanic pile according to the earlier-stage operation state of the galvanic pile; and predicting the future attenuation trend and residual life of the galvanic pile according to the total attenuation amplitude defined by the galvanic pil