Patent ID: 7691504

Claim:
An anode side hydrogen/oxygen interface formation inhibition structure of a fuel cell vehicle, in a stack comprising: a fuel supply unit for supplying fuel containing hydrogen; and an air supply unit for supplying air containing oxygen for generating electrical energy by an electro-chemical reaction of oxygen and hydrogen supplied from each of the fuel supply unit and the air supply unit, the structure comprising: a first hydrogen exhaust pipe extending toward outside of the stack, and including a 3-way valve for allowing hydrogen supplied to the anode of the stack to be discharged for changing the flow of the hydrogen gas discharged from the stack when the fuel cell vehicle shuts down, and for enabling nitrogen and hydrogen consumed at a start-up time to be discharged to atmosphere; and a second hydrogen exhaust pipe, one end of which is connected to the 3-way valve of the first hydrogen exhaust pipe and the other end of which is connected to a first check valve for nitrifying the anode side by reacting the oxygen provided via the first check valve opened and operated when the fuel cell vehicle shuts down, and the hydrogen of the first hydrogen exhaust pipe, wherein a membrane layer and catalyst is formed on the inner side of the first hydrogen exhaust pipe and the second hydrogen exhaust pipe for allowing the oxygen contained in the air introduced via the first check valve and the hydrogen gas filled in the anode side and the first hydrogen exhaust pipe, to be combined so that water may be produced.