Owing to the popularization of electric vehicles worldwide and the development of renewable energy supply, the Li-ion batteries are widely used from small-scale personal mobile products to large-scale energy storage systems. Recently, the number of retired power batteries has largely increased, causing environmental protection threats and waste of resources. Since most of the retired power batteries still possess about 80% initial capacity, the second use of them becomes a possible route to solve the emergency problem. The safety and performance are important in using these second-use repurposing batteries. Underwriters Laboratories (UL), a global safety certification company, published the standard for evaluating the safety and performance of repurposing batteries, i.e., UL 1974. In this work, the test procedures are designed according to UL 1974 and the charge/discharge profile dataset of the LiFePO4 repurposing batteries provided. Researchers/engineers can use the characteristic curves in estimating the repurposing batteries under UL 1974. Furthermore, the profile dataset can be applied in the model-based engineering of repurposing batteries, e.g., fitting the variables of an empirical model or validating the results of a theoretical model.
Charge/discharge profiles of LiFePO4 repurposing batteries based on UL 1974
