Patent ID: 8952649
Filing Date: 2015-02-10
Classification: B60L,H01M,Y02E,Y02T

Abstract:
1. A method for operating a fuel cell system in a system stand-by mode, said method comprising: determining a power limit value when a system power request falls below the power limit value the system will enter the system stand-by mode; determining that the system power request has fallen below the power limit value; entering a dynamic stand-by mode where a fuel cell stack in the fuel cell system is turned off and a compressor providing cathode air to a cathode side of the fuel cell stack is operated at an idle speed; accumulating a compressor power value identifying how much energy has been consumed by operating the compressor at the idle speed during the dynamic stand-by mode; and entering a static stand-by mode when the accumulated compressor power value reaches a compressor restart energy value that identifies how much energy it takes to start the compressor, wherein entering the static stand-by mode includes turning the compressor off.