Transcription of A Closer Look at State Of Charge (SOC) and State …
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A Closer Look at State Of Charge (SOC) and State …
A Closer Look at State of Charge (SOC) and State of health (SOH) estimation Techniques for batteries Martin Murnane Solar PV Systems, Analog Devices, Ghazel Chief Technology Officer, EBSYS Technology GroupIntroductionBattery stacks based on lithium-ion (Li-ion) cells are used in many applications such as hybrid electric vehicles (HEV), electric vehicles (EV), storage of renewable energy for use at a later time, and energy storage on the grid for various purposes such as grid stability, peak shaving, and renewable energy time shifting. In these applications, it is important to measure the State of Charge (SOC) of the cells, which is defined as the available capacity (in Ah) and expressed as a percentage of its rated capacity.
2 A Closer Look at State of Charge (SOC) and State of Health (SOH) Estimation Techniques for Batteries SOC and SOH Estimation Methods Overview Regarding SOC and SOH estimation methods, three approaches are mainly being used: a coulomb counting method, voltage method, and Kalman filter
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