SYSTEMS, METHODS, AND DEVICES FOR POWER RATING ESTIMATION IN ENERGY STORAGE SYSTEMS

Systems, methods, and devices are provided for normalized capacity estimation for generating a normalized capacity estimate for an energy storage device. The normalized capacity estimation system comprises a voltage sensor for sensing a voltage associated with the energy storage device and generating a voltage signal; a current sensor for sensing a current associated with the energy storage device and generating a current signal; an operational dynamic model module to generate an operational dynamic model associated with the energy storage device; a nominal OCV curve module to generate a nominal OCV curve associated with the energy storage device; a nominal capacity module to generate a nominal capacity associated with the energy storage device; and a normalized capacity estimation module configured to receive the voltage signal, the current signal, the operational dynamic model, the nominal OCV curve, and the nominal capacity and to generate the normalized capacity estimate based on the voltage signal, the current signal, the operational dynamic model, the nominal OCV curve and the nominal capacity; wherein the normalized capacity estimate is generated from the difference between two distinct OCV predictions and filtered based upon (1) the difference between the two distinct OCV predictions and a difference threshold and (2) the gradient of OCV curve at the two distinct OCV predictions and a gradient threshold.