Patent ID: 8450021
Filing Date: 2013-05-28
Classification: B60L,H01M,Y02E,Y02T

Abstract:
1. A fuel cell system comprising: a high voltage bus; a fuel cell stack electrically coupled to the high voltage bus by a DC/DC boost converter, said DC/DC converter including a current controller that controls the current provided by the fuel cell stack, said DC/DC converter further including a voltage device that receives a voltage signal from the high voltage bus, said voltage device providing a time derivative of the voltage signal that defines voltage changes on the bus over time; a high voltage power source electrically coupled to the high voltage bus; and a system controller providing a stack current set-point to the DC/DC converter, said DC/DC converter further including a summer that changes the current stack set-point using the time derivative signal and provides an off-set signal to the current controller that selectively adjusts the current provided by the fuel cell stack to dampen oscillations on the high voltage bus.