Dataset of a Constant Load Discharge Characterization of a Pack Composed of Four Second-Life Batteries

This dataset contains 31 CSV files, each representing a discharge cycle of a battery pack composed of four second-life lithium-ion cells, subjected to a constant load of 6 ohms. The pack is heterogeneous, consisting of four batteries with different capacities and states of health (SOH):#Bat 01: 1390 mAh (SOH: 63%)#Bat 02: 2260 mAh (SOH: 87%)#Bat 03: 1230 mAh (SOH: 55%)#Bat 04: 2400 mAh (SOH: 92%)Each discharge cycle starts when all cells are charged to 4.2 V and ends when the voltage of the lowest-capacity cell (#Bat 03) drops below 2.5 V.During each cycle, the following parameters were recorded every 10 seconds:Voltage of each cellSurface temperature of each cellDischarge currentData acquisition was performed using a Raspberry Pi 3 connected to three ADS1115 analog-to-digital converters. Voltage readings were obtained by directly connecting the battery terminals to the ADS1115 modules. The discharge current was measured using an ACS712 5A Hall-effect sensor, and surface temperatures were monitored using NTC 10k\u03a9 thermistors.