Evaluation Method for Utilizability of Decommissioned Power Battery Trapezoidal Utilization

With the arrival of the climax of power battery decommissioning, a rapid assessment method of decommissioned lithium-ion battery availability based on Hierarchy Process and entropy weight method is proposed to address the issue of battery stepwise utilization. Firstly, the indicators that effectively characterize the aging state of the battery are selected, and the correlation index of these indicators is analyzed; then the combination of hierarchical analysis and entropy weight method is used to assess the availability state of the battery; finally, the accuracy of the different methods on the availability is compared. The results show that the combined method will be more accurate than a single assessment and easier to achieve than dynamic assessment.