Estimate elapsed battery runtime for a industrial robot from usable battery energy, minimum state of charge, traction, working-load and auxiliary power, and active duty cycle. Separating the loads makes it easier to test operating scenarios and identify which demand most affects time between charges.
Elapsed runtime is the estimated clock time before reaching the minimum charge threshold. Active work time is lower when the duty cycle includes idle periods.
Real runtime varies with temperature, battery age, acceleration, load spikes, terrain, conversion losses, and control behavior. Compare the result with logged field data.
A 12 kWh usable battery held above 15% charge provides 10.2 kWh. Combined active power is 2.55 kW; at an 80% duty cycle, average power is 2.04 kW and estimated elapsed runtime is 5.00 hours.
Not always. Enter energy actually available to the robot after battery-management limits when known.
The estimate assumes the listed loads apply only during the active share of elapsed time.
Yes. Include computing, sensors, communications, cooling, and other persistent accessory loads.
Yes. Use the battery's current usable capacity rather than its original rating to reflect degradation.
No. It estimates runtime from a charged state down to the selected minimum state of charge.
| Variable | Meaning |
|---|---|
| Usable capacity | Energy available within battery-management limits |
| Minimum state of charge | Charge retained as an operating reserve |
| Traction power | Average active motion load |
| Work power | Average active tool or process load |
| Auxiliary power | Sensors, computing, cooling, and controls |
| Duty cycle | Active share of elapsed operating time |