Data structure description

You can read the data using the read_data_structure.py script. It demonstrates the basic loading and structure of the standardized data in our processed datasets.

Each file contains the following keys:

• cell_id: the file name of the battery.
• cycle_data: all cycling data of the battery.
  • cycle_number: the cycle number for the cycling data of a cycle.
  • current_in_A: the current value for each data point. Unit is ampere (A).
  • voltage_in_V: the voltage value for each data point. Unit is Volt (V).
  • charge_capacity_in_Ah: the charge capacity value for each data point. Unit is ampere-hour (Ah).
  • discharge_capacity_in_Ah: the discharge capacity value for each data point. Unit is ampere-hour (Ah).
  • time_in_s: the time value for each data point whose unit is second(s).
  • temperature_in_C: the temperature value for each data point. Unit is degree Celsius (C). This information is available only if the raw data provides it.
  • internal_resistance_in_ohm: the internal resistance for each data point. Unit is the ohm (Ω). This information is available only if the raw data provides it.
• form_factor: the format of the battery.
• anode_material: the anode of the battery.
• cathode_material: the cathode of the battery.
• electrolyte_material: the electrolyte of the battery.
• nominal_capacity_in_Ah: the nominal capacity of the battery.
• depth_of_charge: the percentage of capacity charged relative to the nominal capacity during charging.
• depth_of_discharge: the percentage of capacity discharged relative to the nominal capacity during discharging.
• already_spent_cycles: no record. A redundant column inherited from BatteryML.
• max_voltage_limit_in_V: the designed cutoff voltage for charging.
• min_voltage_limit_in_V: the designed cutoff voltage for discharging.
• max_current_limit_in_A: no record. A redundant column inherited from BatteryML.
• min_current_limit_in_A: no record. A redundant column inherited from BatteryML.
• reference: no record, but can be found in the README.md file for each sub-dataset.
• description: no record, but can be found in the README.md file for each sub-dataset.
• charge_protocol: "multi" for multi-stage charging. Otherwise, a value that indicates the current for the constant-current charge.
• discharge_protocol: "multi" for multi-stage discharging. Otherwise, a value that indicates the current for the constant-current discharge.
• SOC_interval: the range of state of charge during the degradation test.