A fuel cell electric vehicle includes a ladder frame, a fuel cell stack, a fuel tank, a joint, and a center tunnel. The ladder frame includes two side members extending in parallel in a front-rear direction of the fuel cell electric vehicle and a plurality of cross members linking the two side members. The fuel tank stores fuel gas to be used by the fuel cell stack. The fuel cell stack and the fuel tank are fixed to the ladder frame. The fuel tank and the joint are linked by a first fuel pipe made of metal, and the joint and the fuel cell stack are linked by a second fuel pipe. The fuel tank and the joint are supported by the ladder frame and accordingly the relative vibration of the joint with respect to the fuel tank is reduced, and are disposed in the center tunnel.

A structure equipped with a fuel cell system, wherein the structure comprises: a skirt configured to form an accumulation space between a bottom of the structure and the ground, an air supplier configured to supply off-gas, which is discharged from the fuel cell system, to at least one space selected from the group consisting of the accumulation space and an internal space of the skirt, and a pressure discharger configured to discharge pressure accumulated in the accumulation space to outside of the skirt from a lower end of the skirt, and wherein lift is imparted to the structure by supplying a predetermined amount of the off-gas from the air supplier to at least one space selected from the group consisting of the accumulation space and the internal space of the skirt.

A structure equipped with a fuel cell system, wherein the structure comprises: a skirt configured to form an accumulation space between a bottom of the structure and the ground, an air supplier configured to supply off-gas, which is discharged from the fuel cell system, to at least one space selected from the group consisting of the accumulation space and an internal space of the skirt, and a pressure discharger configured to discharge pressure accumulated in the accumulation space to outside of the skirt from a lower end of the skirt, and wherein lift is imparted to the structure by supplying a predetermined amount of the off-gas from the air supplier to at least one space selected from the group consisting of the accumulation space and the internal space of the skirt.

An embodiment vehicle body includes a center floor assembly, a side sill disposed along a front-rear direction of the vehicle body on both sides of the center floor assembly in a vehicle width direction and connected to a front body assembly, a fuel cell stack mounting apparatus disposed at a front portion of the center floor assembly and configured to position fuel cell stacks at a lower portion of the center floor assembly, and a hydrogen tank mounting apparatus disposed at a rear of the center floor assembly and configured to position hydrogen tanks at the lower portion of the center floor assembly.

An embodiment vehicle body includes a center floor assembly, a side sill disposed along a front-rear direction of the vehicle body on both sides of the center floor assembly in a vehicle width direction and connected to a front body assembly, a fuel cell stack mounting apparatus disposed at a front portion of the center floor assembly and configured to position fuel cell stacks at a lower portion of the center floor assembly, and a hydrogen tank mounting apparatus disposed at a rear of the center floor assembly and configured to position hydrogen tanks at the lower portion of the center floor assembly.

An exemplary fuel cell ship is a fuel cell ship for propelling a hull by using electric power supplied from a fuel cell that generates electric power through an electrochemical reaction of fuel, and includes a compartment including an emission source of the fuel and a first detector arranged in the compartment to detect the fuel. If the first detector detects that a concentration of the fuel in the compartment is equal to or greater than a first threshold value, a power supply to a non-explosion-proof device in the compartment is stopped.

An exemplary fuel cell ship is a fuel cell ship for propelling a hull by using electric power supplied from a fuel cell that generates electric power through an electrochemical reaction of fuel, and includes a compartment including an emission source of the fuel and a first detector arranged in the compartment to detect the fuel. If the first detector detects that a concentration of the fuel in the compartment is equal to or greater than a first threshold value, a power supply to a non-explosion-proof device in the compartment is stopped.

A vehicle body structure can include a front body assembly, a center floor assembly, and a rear floor assembly connected to each other along the front-rear direction of the vehicle body. The vehicle body structure can include a side sill that is arranged along the front-rear direction of the vehicle body on both sides of the vehicle width direction of the center floor assembly and connected to the front body assembly, a hydrogen tank mounting structure positioned at the front of the center floor assembly to mount at least one hydrogen tank to the lower portion of the center floor assembly, and a fuel cell stack mounting structure positioned at the rear portion of the center floor assembly so as to mount at least one fuel cell stack to the lower portion of the center floor assembly.

A vehicle body structure can include a front body assembly, a center floor assembly, and a rear floor assembly connected to each other along the front-rear direction of the vehicle body. The vehicle body structure can include a side sill that is arranged along the front-rear direction of the vehicle body on both sides of the vehicle width direction of the center floor assembly and connected to the front body assembly, a hydrogen tank mounting structure positioned at the front of the center floor assembly to mount at least one hydrogen tank to the lower portion of the center floor assembly, and a fuel cell stack mounting structure positioned at the rear portion of the center floor assembly so as to mount at least one fuel cell stack to the lower portion of the center floor assembly.

An exemplary fuel cell ship is a fuel cell ship for propelling a hull by using electric power supplied by a fuel cell that generates electric power through an electrochemical reaction of fuel, and includes at least one compartment including an emission source of the fuel, and a vent pipe through which the fuel in the compartment is released to outside of the hull. A release port of the vent pipe is located at a position higher than a cabin or a bridge provided on the hull.