⚡ How It Works

• CC Phase: constant current; voltage rises as SoC increases.
• CV Phase: voltage constant; current tapers to cutoff.
• Visualizes V vs time, I vs time, CC/CV durations, Ah and energy delivered.
• Includes presets for 36V/48V/52V packs and NMC/LFP chemistries.

🏁 Practical Scenarios

• Product pages: show expected charging times at common currents.
• Design checks: test CC currents for optimal CC/CV balance.
• Customer info: provide “Time to 80% / Time to 100%” examples.
• Education: demonstrate voltage curve differences between NMC and LFP.

🛠 How to Use the Tool

1. Select a preset (36V/48V/52V) for nominal voltage & CV settings.
2. Choose chemistry: NMC (gradual voltage rise) or LFP (flat mid-voltage).
3. Set pack capacity (Ah) and starting SoC (0–1).
4. Enter CC current (manufacturer-recommended, 0.2C–1C typical).
5. Set CV cutoff current (e.g., 0.1C).
6. Run simulation and view graphs & stats.
7. Export CSV/JSON for plotting or analysis.

📊 Interpreting Results

• Short CC, long CV: charger voltage-limited; long taper.
• Long CC, short CV: small CC brings pack mostly full before CV.
• Total Ah ≈ CC Ah + CV Ah; energy depends on voltage integration.
• Time to 80% vs 100%: CV tail makes 100% longer; use Ah/SoC to estimate midpoints.

⚠️ Limits & Accuracy

Simulator provides rough visualization only. It does not model:

• Temperature effects on IR and charging current.
• Detailed cell resistance, polarization, plateaus beyond chemistry curves.
• BMS safety cutouts, balancing, or max charge limits.
• Cell aging or capacity fade.
• Exact manufacturer curves.

Always validate critical designs with datasheets and real tests.

💡 Advanced Tips

• Use chemistry model for realistic CV voltage.
• Try different CC currents to optimize charge time vs CV tail.
• Adjust tau to reflect faster/slower CV taper.
• Export CSV for Excel or custom plots.

📝 Developer Notes

• Outputs time, V, I, SoC for analysis.
• Import per-cell SoC→Voltage tables for more accurate curves.
• Add BMS presets for realistic simulations.
• Optionally model temperature using V = OCV + I*R_internal.

📌 Example Workflows

• Support page: show charging times for 48V pack at 2A charger (20%→80% ≈ 2h).
• Charger selection: compare CC=5A vs CC=10A for total charge time vs CV tail trade-off.

⚠️ Safety Note

Use for visualization & planning only. For safety-critical decisions, consult battery/charger/BMS datasheets and perform controlled tests.