Lithium Battery State-of-Charge Estimation Device with Enhanced Robustness via Current-Adaptive Extended Kalman Filter
This technology relates to a device that measures battery terminal voltage and load current to estimate the state of charge using an electrical equivalent circuit model and a current-adaptive extended Kalman filter.
Conventional state-of-charge estimation methods have limitations in maintaining accuracy, as estimation errors increase when load current fluctuates rapidly over time.
By applying a current-adaptive extended Kalman filter, this technology can be integrated into battery management systems to robustly estimate the state of charge even under time-varying load current conditions.
Key Features:
- A state-of-charge estimation device including a real-time data measurement unit that monitors battery terminal voltage and load current.
- A configuration that estimates the battery's state of charge in real time based on an electrical equivalent circuit model.
- A configuration that applies a current-adaptive extended Kalman filter during state-of-charge estimation to ensure robust performance against time-varying load currents.
- A device configured to robustly estimate the state of charge of lithium-ion batteries even under time-varying load current conditions.
