Are retired lithium batteries utilizing their residual value efficiently?

As these batteries reach the end of their life cycle, efficiently utilizing their residual value has become a key issue that needs to be resolved. This paper reviews the key issues in the cascade utilization process of retired lithium batteries at the present stage.

How to maximize residual value of retired lithium batteries before Cascade utilization?

However, to maximize the residual value of these batteries before cascade utilization, it is necessary to estimate their residual capacity and perform consistency sorting. This paper primarily introduces the development status of residual capacity estimation and consistency sorting of retired lithium batteries.

Can lithium-ion batteries be repurposed?

Zhou, P. ∙ Liang, J. ∙ Liu, Y. Capacity estimation for lithium-ion batteries is a key aspect for potentially repurposing retired electric vehicle batteries. Here, Zhou et al. use real-world data from retired lithium-ion batteries and develop a neural network for capacity estimation with reduced need for charge-discharge testing.

What are the methods for estimating residual capacity of retired batteries?

Currently, the methods for estimating the residual capacity of retired batteries are mainly classified into two main categories: direct and indirect estimation methods. Direct estimation methods include (i) CC; (ii) OCV; and (iii) Electrochemical impedance spectroscopy (EIS).

Why is a battery not suitable for a residual value assessment?

However, because they are external features of the battery, capturing its internal electrochemical state in depth is difficult, and obtaining features such as charge/discharge curves and capacity takes a long time, making them unsuitable for residual value assessment of large-scale RBs.

Are retired lithium-ion batteries a viable disposal option for electric vehicles?

With the large-scale retirement of power lithium-ion batteries in electric vehicles, the appropriate disposal of retired batteries (RBs) has become an important concern. Evaluating the residual value and exploring secondary applications for RBs are considered promising technical approaches.