Cycle life of cylindrical lithium battery

Second, the external and internal factors affecting the cycle life of lithium-ion batteries are investigated in detail, including temperature, charge/discharge multiplier, charge/discharge cut-off voltage, cell performance inconsistency, solid electrolyte interphase (SEI) film, and copper foil.

Therefore, the experiment data showed that power lithium-ion batteries directly affected the cycle life of the battery pack and that the battery pack cycle life could not reach the cycle life of a single cell (as elaborated in Fig. 14, Fig. 15). Fig. 14. Assessment of battery inconsistencies for different cycle counts . Fig. 15.

The dataset contains approximately 96,700 cycles; to the best of the authors' knowledge, our dataset is the largest publicly available for nominally identical commercial lithium-ion batteries cycled under controlled conditions (see Data availability section for access information).

The task of predicting lithium-ion battery lifetime is critically important given its broad utility but challenging due to nonlinear degradation with cycling and wide variability, even when controlling for operating conditions 7, 8, 9, 10, 11. Many previous studies have modelled lithium-ion battery lifetime.

Among all power batteries, lithium-ion power batteries are widely used in the field of new energy vehicles due to their unique advantages such as high energy density, no memory effect, small self-discharge, and a long cycle life [, , ]. Lithium-ion battery capacity is considered as an important indicator of the life of a battery.

Many scholars [7, 8] have pointed out that the capacity of lithium-ion batteries below 80 % of the nominal capacity is considered to be the end-of-life (EOL) in practical applications.