Patent ID: 8700225
Filing Date: 2014-04-15
Classification: B60L,G05B,H01M,H02J,Y02B,Y02E,Y02T,Y04S

Abstract:
1. A method, comprising: monitoring a frequency of an electrical power distribution system; when the frequency of the electrical power distribution system is in a first frequency range, receiving power from the electrical power distribution system and charging an energy storage device at a charging rate with the received power, the charging rate being selected based at least in part on a pre-determined or user-selected completion time for charging the energy storage device; and when the frequency of the electrical power distribution system is in a second frequency range different from the first frequency range, discharging the energy storage device at a discharging rate and delivering power from the energy storage device to the electrical power distribution system, the discharging rate being selected based on a measured average charging rate for the energy storage device, the discharging rate also being selected to allow charging the energy storage device to a completion charge by the end of the pre-determined or user-selected completion time.