Emergency starting system and method for fuel cell hybrid vehicle

摘要

An emergency starting system and an emergency starting method of a fuel cell hybrid vehicle perform an emergency start when a DC power converter for starting fails. The emergency starting system includes: a fuel cell and a super capacitor connected through a main bus terminal in parallel; a driving inverter connected to the main bus terminal; a driving motor connected to the driving inverter; a balance-of-plant configured to activate the fuel cell; a starting DC power converter configured to drive the balance-of-plant; and a starting controller configured to control the super capacitor at the time of a start. The starting controller includes a super capacitor relay, an initial charging relay, and an initial charging resistor, the initial charging relay includes a plurality of relays, and the initial charging resistor includes a plurality of resistors.

主权项

1. An emergency starting method of a fuel cell hybrid vehicle, comprising steps of:
turning on ignition of a vehicle; determining whether a starting DC power converter of the vehicle fails; when the starting DC power converter fails, determining whether a remaining voltage of a super capacitor is equal to or greater than a reference voltage; when the remaining voltage of the super capacitor is equal to or greater than the reference voltage, performing an emergency start by using the super capacitor; wherein the fuel cell hybrid vehicle includes a super capacitor relay, an initial charging relay, and a resistor for charging the super capacitor at an initial start for starting of the vehicle; the initial charging relay includes a plurality of relays, and the initial charging resistor includes a plurality of resistors; and the step of performing of the emergency start comprises: activating a fuel cell by turning on at least one of the plurality of relays to drive a balance-of plant; when the fuel cell is activated, charging the super capacitor by turning on the plurality of relays; and when the charging of the super capacitor is completed, setting a driving preparation state by turning on the super capacitor relay.