A fuel cell vehicle includes a fuel cell stack, a stack case containing the fuel cell stack, and an interruption control unit for electrically interrupting an output line of the fuel cell stack at the time of vehicle collision. The interruption control unit is arranged on an upper surface of the stack case, and a front end of the interruption control unit is positioned on the vehicle rear side as compared with a front end of the stack case.

A power supply device disposed on an aircraft to provide a power to the aircraft is provided. The aircraft has an average required power value. The power supply device includes a secondary battery, a transformer and a fuel cell. The transformer is coupled between the secondary battery and the aircraft. The fuel cell is coupled to the aircraft and is adapted to provide a first output current to the aircraft. The transformer has an output voltage set value. When the first output end voltage of the fuel cell is lower than the output voltage set value, the transformer provides a second output current of the secondary battery to the aircraft. The output voltage set value is in a voltage range with a fuel cell output power between the maximum power value of characteristic curve of the fuel cell and the average required power value of the aircraft.

A fuel cell system includes a first fuel cell stack having a discharge manifold, a second fuel cell stack having a discharge manifold, a first auxiliary machine used for power generation of the first fuel cell stack, a second auxiliary machine used for power generation of the second fuel cell stack, and a controller configured to control operation of the first auxiliary machine and the second auxiliary machine. The controller is configured to control operation of the first auxiliary machine and the second auxiliary machine, such that one of the first fuel cell stack and the second fuel cell stack, of which a discharge direction of reaction gas discharged from the discharge manifold forms a smaller angle with a vertical downward direction, starts generating power earlier than the other fuel cell stack, after power generation of the first fuel cell stack and the second fuel cell stack is stopped.

A fuel cell system includes a stack case and an auxiliary device case. The stack case stores a stack including a power generation cell stack body including a plurality of power generation cells stacked horizontally in a stacking direction, and an insulating plate stacked at an end of the power generation cell stack body in the stacking direction. The auxiliary device case stores a fuel cell auxiliary device. The inside of the stack case and the inside of the auxiliary device case that are adjacent to each other in the stacking direction are separated by a partition wall. The partition wall has ventilation connection ports. The ventilation connection ports connect the inside of the stack case with the inside of the auxiliary device case. The insulating plate provided closer to the partition wall, than the power generation cell stack body, inside the stack case faces the ventilation connection ports.

A power supply device for the electric power supply of at least one consumer is provided having a primary power grid in which there is present a fuel cell arrangement comprising electric contacts which includes a discharge circuit switched in parallel and connected to the electric contacts comprising a switch element activatable by means of a controller across a switch line as well as a resistance element and having a DC-DC converter which is present in the primary power grid by which the primary power grid is connected to a secondary power grid characterized in that the discharge circuit comprises a safety device or a safety function, which holds the switch element in an opened state and thereby makes the discharge circuit inactive for as long as an actuating possibility exists via the switch line, and which places the switch element in a closed state and thereby makes the discharge circuit active for lowering the voltage of the fuel cell arrangement once the actuating possibility via the switch line is denied. Furthermore, a method for lowering the voltage of a fuel cell arrangement of a power supply device is also provided.

A vehicle rear structure includes: a fuel tank arranged between a pair of side members; and a floor panel. The floor panel includes: a front floor panel and a rear floor panel that cover an upper surface and a rear surface of the fuel tank. and that have a roof section located above height positions of flanges of the side members. The rear floor panel has: a bottom surface located below the height positions of the flanges of the side members; rear vertical wall sections raised upward from both of left and right sides of the bottom surface; and rear flat sections folded to the left and the right at upper ends of the rear left and right vertical wall sections and joined to upper surface sides of the flanges on a vehicle inner side of the pair of side members.

The subject matter described herein generally relates to look ahead energy management and control systems and methods for detecting, incorporating, and leveraging look ahead technology data to improve the performance, durability, and life of fuel cell systems.

A fuel cell vehicle includes a fuel cell and a junction box. The fuel cell includes at least one cell stack including a plurality of unit cells in a stacked configuration, heaters disposed at end portions of the at least one cell stack, current collectors disposed at the end portions of the at least one cell stack, a terminal block electrically connecting the current collectors and the heaters to the junction box, a positive bus bar and a negative bus bar electrically connecting the current collectors to the terminal block, and a positive wire and a negative wire electrically connecting the heaters to the terminal block. The junction box includes a first switching unit disposed between the positive wire and the positive bus bar, and a second switching unit disposed between the negative wire and the negative bus bar.

An exemplary embodiment of the present disclosure provides an insulation resistance detection apparatus including a processor configured to separate a fuel cell from a high voltage battery depending on an insulation resistance value of a vehicle during driving of the vehicle, and then to measure an insulation resistance value of the fuel cell to determine whether it is a failure of the fuel cell or a failure of the high voltage battery, and when it is the failure of the fuel cell, to determine a cause of the failure by calculating an insulation resistance variation; and a storage configured to store data and algorithms driven by the processor.

Embodiments are directed to a fuel cell protection system comprising an aircraft fuselage having an inner surface and an outer surface, an attachment point mounted on the outer surface, an aircraft fuel cell spaced apart from the inner surface, and a plate positioned between the inner surface and the aircraft fuel system, the plate spaced apart from the inner surface to create a void space. The attachment point may be a cargo hook. The void space is configured to receive all or a portion of the cargo hook after a crash. The plate creating the void space may be a rigid material or may be a ballistic fabric material.