"Experimental Dataset of retired batteries (first-life, second-life and third-life) discharged at constanst current rate"

"a { text-decoration: none; color: #464feb; } tr th, tr td { border: 1px solid #e6e6e6; } tr th { background-color: #f5f5f5; }This dataset provides experimental data from nine discharge tests conducted on nine retired lithium-ion batteries, which were classified into three groups according to their state of health (SoH). These groups represent different stages of battery lifespan:Group 1: First-life batteriesCell 001: 2156 mAh (SoH: 98%)Cell 002: 2068 mAh (SoH: 94%)Cell 003: 1870 mAh (SoH: 85%)Group 2: Second-life batteriesCell 004: 1410 mAh (SoH: 64%)Cell 005: 1406 mAh (SoH: 64%)Cell 006: 1320 mAh (SoH: 60%)Group 3: Third-life batteriesCell 007: 1232 mAh (SoH: 56%)Cell 008: 924 mAh (SoH: 42%)Cell 009: 748 mAh (SoH: 34%)For each cell, nine discharge experiments were carried out using different constant current rates ranging from 0.5 A to 4.5 A, with increments of 0.5 A. During each experiment, key parameters were recorded at a sampling rate of 1 Hz throughout the entire discharge process. Prior to each test, the cell was fully charged to 4.2 V and subsequently discharged at a constant current until reaching a cutoff voltage of 2.5 V.The following parameters were monitored and recorded:DATE: Date and time of the experiment;VOLTAGE (V): Cell terminal voltage;CURRENT (A): Discharge current (negative values indicate discharge direction);POWER (W): Instantaneous discharge power;RESISTANCE (\u03a9): Equivalent discharge resistance;NTC_TEMP (\u00b0C): Surface temperature of the cell.The data acquisition system was developed using a Raspberry Pi 4 and an ADS1115 analog-to-digital converter, interfaced via the I\u00b2C protocol. Discharge current measurements were obtained using an ACS712 5 A Hall-effect sensor, while surface temperature was monitored using NTC 10 k\u03a9 thermistors.  "