Second-life LFP battery dataset

The dataset contains 23 second-life LFP batteries. The battery brand is LongTTech. The degradation history of these cells is unknown. Therefore, each battery was subjected to three capacity tests following the standard capacity testing protocol, and the final capacity was determined as the average of the three measurements. The capacity of each cell is indicated in the title of its corresponding dataset.

Each battery was then charged using a standard constant-current/constant-voltage (CC/CV) charging protocol, with a charging current of 1C and a constant voltage of 3.65 V. The charging temperature was maintained at 25 °C.

The dataset includes measurements of date, voltage, current, temperature, and SOC, with a sampling interval of 1 s. The SOC is calculated based on the nominal capacity.  The tests were performed using a Neware battery testing system (CTE-8008T-5V60A). The measurement accuracy of voltage and current is ±0.05%, and the temperature measurement accuracy is ±1 °C.