Patent ID: 9272627
Filing Date: 2016-03-01
CPC Classification: B60L,Y02T

Claim Text:
1. A method for use with an energy storage system connected with a variable load, the load at some times drawing power from the energy storage system and at other times regenerating power to be stored within the energy storage system, the power draw being greater at some times and lesser at other times, the regenerated power to be stored being greater at some times and lesser at other times, the energy storage system comprising a storage battery and an ultracapacitor, the method comprising the steps of: monitoring the state-of-charge (SOC) of the ultracapacitor; dynamically establishing a set point toward which the SOC is configured to be driven; and adjusting the dynamic set point as a function of sensed load currents, wherein the sensed load currents are sensed between the storage system and the load, and wherein the dynamic establishment of the set point is a function of an average of the lowest three frequencies obtained by a fast Fourier transform of the sensed load currents.