![]() Early life failure replacement found that, despite mismatches in impedance and capacity, a new cell can perform adequately within a pack of moderately aged cells. The cell replacement strategies investigation considers two scenarios: early life failure, where one cell in a pack fails prematurely, and building a pack from used cells for less demanding applications. ![]() The baseline results indicate nearly the same rate of capacity fade for single cells and those aged in a pack however, the capacity variation due to a few degrees changes in room temperature (≃☓ ∘C) is significant (≃☑.5% of capacity of new cell) compared to the percent change of capacity over the battery life cycle in primary applications (≃20–30%). This paper first examines the baseline results of aging individual cells, then aging of cells in a representative 3S3P battery pack, and compares them to the results of repaired packs. Because many battery systems now feature a very large number of individual cells, it is necessary to understand how cell-to-cell interactions can affect durability, and how to best replace poorly performing cells to extend the lifetime of the entire battery pack. The economic value of high-capacity battery systems, being used in a wide variety of automotive and energy storage applications, is strongly affected by the duration of their service lifetime.
0 Comments
Leave a Reply. |