Safety margin for Li-plating-free fast-charging of Li-ion batteries considering parameter uncertainty

Paper in proceeding, 2024

The widespread adoption of electric vehicles has led to increasing concerns about range anxiety. Fast charging of the lithium-ion battery is an important part of addressing this problem. However, a higher charging rate also tends to cause more rapid degradation and shorter battery life. Therefore, how to charge as fast as possible while not leading to excessive aging has become an important research topic. This paper introduces a single particle model-based inversion-based fast charging method with a calculated safety margin. The inversion-based fast-charging method relies a lot on the accuracy of the model parameters that cannot be identified precisely due to inevitable differences between the model and the plant. Provided with the range of parameter uncertainty, a theoretical Li-plating safety margin is calculated with which lithium-plating can be completely avoided. Simulation results demonstrate the effectiveness of the proposed algorithm.