Real-time estimation of battery state-of-charge using voltage and current measurements
Smartphones & Laptops: Provides accurate battery percentage even when voltage readings fluctuate due to temperature changes or aging batteries.
Electric Vehicles: Gives drivers reliable range estimates by combining multiple sensors and learning battery degradation patterns over time.
Power Tools & Drones: Prevents unexpected shutdowns by filtering sensor noise and predicting remaining runtime under varying loads.
Key Benefits: More accurate estimates than simple voltage meters, adapts to battery aging, reduces "battery anxiety" by providing reliable predictions, and extends battery life through better management.
State Vector: [State of Charge %, Battery Capacity Ah]
Measurements: Noisy voltage and current readings
Prediction: SoC decreases based on current draw and capacity
Update: Corrects estimate using voltage-SoC relationship
Benefits: Smooths noisy measurements, estimates uncertainty, adapts to battery aging