Use of regenerative braking power for system restart in start / stop operation of fuel cell hybrid vehicles

摘要

A system and a method for using regenerative braking power to start a fuel cell stack for system restart during start / stop operation of a fuel cell hybrid vehicle are disclosed. The method includes that the fuel cell stack is separated from a high-voltage bus line for the start / stop operation and regenerative braking power provided by an electric drive system is used to recharge a battery in the hybrid vehicle during the start / stop operation. The method also includes that the fuel cell stack is reconnected to the high-voltage bus line and at least some of the regenerative braking power is provided by the electric drive system to a compressor, which provides cathode air to the fuel cell stack when the stack at the end of the start / stop operation again connected to the high voltage bus line. A bidirectional DC / DC converter selectively distributes power to the compressor and battery.