Economic value evaluation method and device for retired lithium ion battery

The invention belongs to the technical field of lithium ion battery processing, and discloses a method and a device for evaluating the economic value of a retired lithium ion battery, and the method comprises the steps: obtaining historical aging data of a target battery in a use process, and predicting the capacity fading change trend of the target battery in combination with the historical aging data, thereby achieving the evaluation of the economic value of the retired lithium ion battery. Singleness and subjectivity caused by manual evaluation are avoided, and the accuracy of a prediction result can be guaranteed; meanwhile, battery state parameters can be calculated according to the historical aging data, and the purchase cost of the decommissioned lithium ion battery pack where the target battery is located is evaluated according to the predicted capacity recession change curve and the battery state parameters, so that the economic value of the decommissioned lithium ion battery is calculated from the a