⚡ Module 6: Power Management
Control Strategies
1. Constant Power Strategy (Recommended):
FC runs at constant optimal power (60-70% rated)
Battery provides all power variation
Advantages: Extended FC life, optimal efficiency
2. Load Following Strategy:
FC output tracks load demand directly
Disadvantages: Frequent power changes reduce stack life
Drive Cycle Simulation
Figure 6.1: Hybrid power split during typical golf cart operation
Battery SOC Management
| SOC Range | Operating Mode | Strategy |
|---|---|---|
| 90-100% | Full Charge | FC output reduced, battery provides main power |
| 50-90% | Normal Operation | Hybrid mode, optimal power split |
| 30-50% | Charge Priority | FC runs at higher power to recharge battery |
| 20-30% | Low Battery Warning | FC maximum output, limited battery discharge |
Key Takeaway
Operating the FC at 50-70% of maximum power provides the best balance between efficiency, component life, and performance. The hybrid battery handles power variations, allowing the FC to run in its optimal range.