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Full-Text Articles in Controls and Control Theory
A Lithium Battery Current Estimation Technique Using An Unknown Input Observer, Daniel Cambron
A Lithium Battery Current Estimation Technique Using An Unknown Input Observer, Daniel Cambron
Theses and Dissertations--Electrical and Computer Engineering
Current consumption measurements are useful in a wide variety of applications, including power monitoring and fault detection within a lithium battery management system (BMS). This measurement is typically taken using either a shunt resistor or a Hall-effect current transducer. Although both methods have achieved accurate current measurements, shunt resistors have inherent power loss and often require isolation circuitry, and Hall-effect sensors are generally expensive. This work explores a novel alternative to sensing battery current by measuring terminal voltages and cell temperatures and using an unknown input observer (UIO) to estimate the battery current. An accurate model of a LiFePO4 …