DATA_STATUS.md

Real Battery Dataset Status

Summary

Fake/Sample Data: ✅ DELETED

Real Data Downloaded:

✅ NASA Datasets (COMPLETED)

• Source: https://github.com/huzaifi18/RUL_prediction
• Files Downloaded: 6 CSV files (charge and discharge for B0005, B0006, B0007)
• Location: data/nasa/
• Converted Files: 3 files in standard format
• Location: data/nasa_converted/
• Format: ✅ Converted to standard format (cycle_index, voltage, current, temperature, capacity)
• Files:
  • B0005.csv (168 cycles, 13 KB)
  • B0006.csv (168 cycles, 13 KB)
  • B0007.csv (168 cycles, 13 KB)

✅ Stanford Datasets (COMPLETED)

• Source: https://github.com/petermattia/revisit-severson-et-al
• Files Downloaded: 41 CSV files (cell1.csv through cell41.csv)
• Location: data/stanford/
• Total Size: ~30 MB
• Format: ⚠️ DIFFERENT FORMAT - Matrix format (99 columns, appears to be voltage arrays)
• Note: Structure needs verification - columns are numeric values, not cycle_index/voltage/current/temperature/capacity

⏸️ CALCE Datasets (PENDING)

• Source: https://ioft-data.engin.umich.edu/calce-battery-datasets/
• Status: Requires manual download from IoFT mirror
• Format: CSV/text files
• Action Needed: Manual download required

📋 Zenodo Datasets (ANALYZED - RECOMMENDATION PROVIDED)

Dataset: Lithium-ion battery degradation: comprehensive cycle ageing data and analysis for commercial 21700 cells
Total Size: 49.4 GB
Zenodo Link: https://zenodo.org/records/10637334

Available Files:

1. experiment_metadata.xlsx (21.9 KB)

   • Status: ✅ RECOMMENDED FIRST
   • Reason: Small metadata file - check structure before downloading large files

2. Expt 5 - Standard Cycle Aging (Control).zip (11.4 GB)

   • Status: ✅✅ BEST CHOICE - RECOMMENDED
   • Reason: Standard cycling conditions, control baseline, most general purpose
   • Priority: 1

3. Expt 4 - Drive Cycle Aging (Control).zip (11.4 GB)

   • Status: ✅ GOOD CHOICE - RECOMMENDED
   • Reason: Realistic drive cycles, control conditions
   • Priority: 2

4. Expt 3 - Cathode Degradation and Li-Plating.zip (12.0 GB)

   • Status: ⚠️ NOT RECOMMENDED INITIALLY
   • Reason: Specific degradation mode (cathode degradation, Li-plating)
   • Use: Specialized analysis only

5. Expt 2 - C-based Degradation 2.zip (6.5 GB)

   • Status: ⚠️ NOT RECOMMENDED INITIALLY
   • Reason: Specific chemistry (C-based)
   • Use: Specialized analysis only

6. Expt 1 - Si-based Degradation.zip (9.1 GB)

   • Status: ⚠️ NOT RECOMMENDED INITIALLY
   • Reason: Specific chemistry (Si-based)
   • Use: Specialized analysis only

Recommended Download Strategy:

1. First: Download experiment_metadata.xlsx (21.9 KB) to understand data structure
2. Priority 1: Download Expt 5 - Standard Cycle Aging (Control).zip (11.4 GB)
3. Priority 2 (Optional): Download Expt 4 - Drive Cycle Aging (Control).zip (11.4 GB)
4. Skip initially: Expt 1-3 (too specific, save for later analysis)

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Data Format Requirements

Our model expects CSV files with columns:

• cycle_index: Cycle number
• voltage: Battery voltage (V)
• current: Battery current (A)
• temperature: Battery temperature (°C)
• capacity: Battery capacity (Ah)

Current Data Status

Dataset	Status	Files	Format Match	Ready to Use
NASA (converted)	✅ Downloaded & Converted	3 files	✅ Yes	✅ Yes
Stanford	✅ Downloaded	41 files	⚠️ No (different format)	⏸️ Needs conversion
CALCE	⏸️ Not downloaded	-	-	-
Zenodo	📋 Analyzed	0 files	-	-