Hard launches and hill sprints pull phase current above continuous ratings. This e-scooter peak discharge current calculator compares your peak draw to controller amps and pack Ah × C—before BMS cutback or connector heat ends the burst.
Benefits
- Validates peak amps vs. controller phase limit and pack max discharge (Ah × C).
- Peak power (W) = battery voltage × peak amps for burst planning.
- Flags when acceleration exceeds pack C-rate even if the controller allows more.
How it works
- Enter measured or estimated peak draw in amps during hard acceleration.
- Set controller limit (A), pack capacity (Ah), and continuous C-rating.
- Add battery voltage (V)—read peak watts and whether draw is within controller and pack.
FAQ
What does an e-scooter peak discharge current calculator check?
It compares your burst current to two ceilings: the controller's phase amp limit and the pack's max discharge approximated as capacity (Ah) × continuous C-rating. It also reports peak watts (V × A) and pass/fail flags for each limit.
What is pack max discharge amps?
In this tool, max pack amps ≈ Ah × C. A 7.8 Ah pack at 2C supports ~15.6 A continuous—brief peaks above that may be tolerated but heat accumulates in small cells. Peak draw above max pack amps triggers the within-pack warning.
Example with default inputs?
18 A peak, 20 A controller, 7.8 Ah at 2C (15.6 A max pack), 36 V: within controller yes, within pack no, peak power ≈ 648 W. The controller allows the burst but the pack C-rate is exceeded.
Peak vs continuous motor amps?
Controllers and BMS specs often list continuous phase current separately from brief peaks. Enter your measured launch or hill-sprint peak—not flat-ground cruise amps. Pair with connector-loss and hill-climb tools for full route stress.
Technical specifications
- Max pack amps = capacity (Ah) × continuous C-rating.
- Peak power (W) = battery voltage (V) × peak amps (A).
- Within controller when peak amps ≤ controller limit.
- Within pack when peak amps ≤ max pack amps.
- Related: escooter-connector-loss, escooter-hill-climb, escooter-weight-limit.