Abstract:

lithium ion battery has been increasingly applied in the field of mobile and stationary energy storage because of its excellent comprehensive performance. There is always a plurality of battery cells in parallel and/or series in practical application, leading to a faster performance degradation than the single cell. In addition to the uneven operating environment (such as temperature uniformity), the inconsistency of performance among the battery cells in the battery pack is the main reason for the rapid decay of the battery pack performance. To screen single cells with uniform characteristics simply, quickly and effectively is the goal of engineering in practice. In this paper, the consistency screening of lithium ion batteries in recent years are reviewed. The concept and definition of the consistency of lithium ion batteries are explored. The rapid and effective screening by cells in series are evaluated.

Key words: lithium ion batteries, battery pack, consistency, screening, series screening