Abstract: Aiming at the problem of inconsistent initial characteristic parameters of retired batteries and poor screening effect of battery modules under multiple influencing factors,a method for condition evaluation and screening of battery modules based on SOP dynamic consistency is proposed. Firstly,in order to effectively characterize the initial characteristics of retired power batteries during echelon utilization screening,it selects the terminal voltage,capacity and internal resistance as static screening parameters,and an improved Kmeans clustering static screening method based on density is proposed. Secondly,single cells with good consistency are selected from the initial screening results,the characteristic relationships between voltage,state of charge（SOC）,state of health（SOH）and state of power（SOP）are established,and SOP characteristics of retired power batteries are estimated. Finally,the retired batteries with the same power state after static screening are connected in series into groups,the relationship between SOP and battery module life loss is established,and retired power battery modules based on SOP dynamic consistency is screened. The validity of the proposed screening method is verified by simulation analysis,which can effectively prolong the service life of decommissioned batteries.