A system and method for emergency starting of a fuel cell vehicle is provided. In particular, a high-voltage converter, a balance of power (BOP), and a controller are included in the system. The high-voltage converter is configured such that one side thereof is connected to a high-voltage battery via a battery switch and the other side thereof is connected in parallel to a plurality of fuel cells. The BOP is connected in parallel to the high-voltage converter and the fuel cells. The controller is configured to control the power supplied from the high-voltage battery to the BOP without conversion by connecting the battery switch upon the failure of the high-voltage converter or high-voltage battery.

A fuel cell hydrogen supply fault diagnosis system is provided. The system includes multiple fuel tanks that store hydrogen therein to supply the hydrogen and a fuel tank valve disposed at each of the fuel tanks and configured to be opened or closed to supply or shut off the hydrogen of the fuel tanks. A pressure sensor measures pressure in a fuel supply line that extends from each of the multiple fuel tanks to be integrally connected to a fuel cell stack. A supply amount estimator then estimates a supply amount of hydrogen supplied to the fuel cell stack and a consumption amount estimator estimates a consumption amount of hydrogen consumed in a reaction in the fuel cell stack or discharged therefrom. A fault detector then detects a hydrogen supply state.

A power supply method carried out in a system that includes a fuel cell, a secondary battery, a motor, and an auxiliary for the fuel cell includes controlling an intermittent operation by which execution and stoppage of power generation by the fuel cell is switched intermittently to supply power to electric power loads including the motor and the auxiliary, determining whether or not an abnormality occurs in the secondary battery during the intermittent operation, instructing the motor to regenerate power on a condition that it is determined that an abnormality occurs in the secondary battery in the determination of whether or not the abnormality occurs, and supplying power, which is obtained by carrying out the regeneration, to the auxiliary.

A power supply device for a vehicle that is chargeable from an external power supply provided external to the vehicle, including a main battery and a battery pack that is attachable to and detachable from the vehicle. The battery pack includes a sub battery for driving electric loads common to the main battery and the sub battery, and a connector provided with a first storage unit storing information related to the sub battery. The power supply device for the vehicle further includes a control device performing control related to the main battery, and reading the information from the first storage unit and performing control related to the sub battery.

A fuel cell vehicle includes a fuel cell, a fuel storage container, a container installation space, a fill lid box, and a fuel gas detector. The fuel cell is to generate power through an electrochemical reaction between a fuel gas and an oxidant gas. At least part of the fuel storage container is disposed in the container installation space. The fill lid box includes a gas fill port inside the fill lid box and has a communication hole to connect an inside of the fill lid box with the container installation space. The fuel gas is to be supplied through the gas fill port into the fuel storage container from an outside of the fuel cell vehicle. The fuel gas detector is disposed inside the fill lid box to detect a fuel gas leakage and to detect a fuel gas density in the container installation space.

A fuel cell vehicle insulation resistor fault detection system, comprising: a stack, a stack pre-charge circuit, a power cell, a power distribution controller, a high voltage component, a VCU (vehicle control unit) and at least one insulation detector. The stack is connected to the stack pre-charge circuit, the stack pre-charge circuit is connected to the power cell, the power cell is connected to the power distribution controller, the power distribution controller is connected to the high voltage component and the VCU is connected to the insulation detector. When the insulation detector is used to detect whether the insulation resistor of the stack is faulty, the stack is connected to the insulation detector; when the insulation detector is used to detect whether the insulation resistor of the power cell is faulty, the power cell is connected to the insulation detector; and when the insulation detector is used to detect whether the insulation resistor of the high voltage component is faulty, the power distribution controller is connected to the insulation detector. When an insulation resistor of the fuel cell vehicle is faulty, the source of the insulation resistor fault can be located in time.

A method for discharging a high-voltage system in a vehicle, the high-voltage system having at least one energy store and a plurality of high-voltage consumers. To discharge the high-voltage system, the electrical energy store is first separated from the rest of the vehicle electrical system, and at least one of the high-voltage consumers is switched on, so that the charge stored within the system drains via the consumers.

A leak hydrogen absorbing device is provided and includes an absorbing tank, having a gas inlet and a gas outlet; a spacer, disposed inside the absorbing tank, and partitioning an interior of the absorbing tank into multiple spaces; a hydrogen absorbing material, disposed in the spaces; a connecting tube, disposed on the spacer, and connecting the spaces; a pump, pumping a hydrogen-containing gas leaked in a closed environment to the absorbing tank through the gas inlet to be flowed through the spaces inside the absorbing tank, so that the hydrogen gas contained in the hydrogen-containing gas is absorbed by the hydrogen absorbing material; and a depressurizing portion, disposed at a terminal end of the absorbing tank, and storing a hydrogen-free gas passed through the hydrogen absorbing material. The hydrogen-free gas is discharged through the gas outlet when reaching a predetermined pressure.

A process for detecting a low-level leak in a fuel cell system is provided. The process includes, within a computerized fuel cell controller, operating programming to monitor operation of the fuel cell system, determine an expected reduction in pressure within an anode gas loop of the fuel cell system based upon the monitored operation, determine a calibrated threshold pressure change based upon the expected reduction in pressure and a margin selected to indicate excess hydrogen gas within the anode gas loop indicating a fuel injector leak, when a fuel injector of the fuel cell system is commanded to a closed state, monitor a pressure within the anode gas loop through a time period, compare the monitored pressure within the anode gas loop through the time period to the calibrated threshold pressure change, and when the comparing indicates the excess hydrogen gas is present, taking remedial action.

A hydrogen filling system of the present invention is provided with: a pressure accumulator; a pipe connecting the pressure accumulator and a hydrogen tank on a vehicle; a flow volume control valve, a pressure sensor, and a flow volume sensor with which the pipe is fitted; and a station ECU which operates the control valve under a predetermined filling condition. A gas filling method for filling hydrogen gas into the tank from the accumulator is provided with: a step of, after filling of the hydrogen gas has been started, calculating, using a detected value from the pressure sensor when the flow volume of hydrogen gas in the pipe has decreased, the value of a pressure loss coefficient correlated with a pressure loss caused in the pipe; and a step of changing the filling condition to a condition determined on the basis of the value of the pressure loss coefficient.