Peak Power
Definition
Maximum instantaneous power capability, typically limited by cell discharge capability and voltage sag. Usually specified with duration (e.g., 10-second peak).
Why It Matters
- Critical for acceleration or transient load requirements
- Much higher than continuous power (2-5× typical)
- Limited by cell impedance and voltage window
- Duration determines if thermal limiting occurs
Common Pitfalls
- Not specifying peak power duration
- Not considering peak power at minimum SOC (worst case)
- Ignoring duty cycle limits (time between peaks)
- Not validating peak power at low temperature