"Physics-Guided State-of-Charge (SoC) Dataset \u2013 4 Ah and 8 Ah Batteries"

"This dataset contains laboratory measurements from two 12 V LiFePO\u2084 (LFP) batteries tested under a repeatable pause\u2013discharge\u2013charge protocol. Although both modules are rated at 8 Ah, their usable capacities were experimentally measured as 4.052 Ah and 7.473 Ah, and they are referred to as the \u201c4 Ah\u201d and \u201c8 Ah\u201d batteries throughout the dataset.For each cycle we record time-stamped voltage, current, surface temperature and an operating-mode flag (pause, discharge or charge). The raw data are acquired at 14 Hz with an Arduino-based data acquisition system and then resampled to 1 Hz after basic signal conditioning. Using Coulomb counting with per-cycle baseline correction, we reconstruct a reference state-of-charge (SoC) trajectory for every pause\u2013discharge\u2013charge sequence. The released files include both the raw measurements and the 1 Hz processed versions with derived variables such as SoC and current derivatives.In total, the dataset provides 141 cycles for the 4 Ah battery and 20 cycles for the 8 Ah battery, covering different discharge profiles with short \u201cpulse-like\u201d events and longer load windows. These data are intended for benchmarking SoC estimators, studying hybrid physics\u2013machine learning methods, and exploring transfer learning between batteries with different capacities under realistic low-voltage operating conditions."