A method for enabling a fuel cell system includes the steps of: i) detecting a pressure value, which is indicative of the pressure within a section of the anode sub-system, wherein the section begins downstream of a pressure reducer; ii) relieving the pressure of the section during a pressure relief time interval, if the pressure value is greater than a pressure limit value and a release request is present; and then iii) enabling the fuel cell system if the pressure value in the section after the pressure relief is less than the pressure limit value.

A method for determining aging of a fuel cell system for a vehicle, comprising identifying a future interval in terms of time or distance during which the fuel cell system is expected to operate at stationary operating conditions, obtaining measurement values pertaining to at least one fuel cell parameter indicative of degradation of the fuel cell system during the identified interval, and determining an aging state of the fuel cell system using the measurement values.

The vehicle control apparatus identifies a fuel cell module in which an error occurs among fuel cell modules included in the fuel cell system and an error type, stops the fuel cell module in which the error occurs, except for a case where the same error consecutively occurs in the same fuel cell module among the fuel cell modules, and operates the fuel cell module, in which the error occurs, again.

A high-voltage system of a fuel cell vehicle and a method for operating said system are described herein.

A fuel cell vehicle capable of determining, when a fuel cell vehicle collides with a rigid body, whether a stack is damaged by a visual observation at a low cost. A fuel cell vehicle includes: a fragile part configured to be located so as to come into contact with a side surface of the stack frame that is orthogonal to a direction in which cells in the stack are stacked, and be deformed when a preset collision force causing damage to a stack is applied; and a deformation part configured to form a part of the vehicle body, and be deformed and come into contact with the fragile part when a collision force is applied to the vehicle body.

A method for reducing the carbon corrosion in a fuel cell stack of a fuel cell system includes the steps of detecting a corrosion value which is representative of the extent of the carbon corrosion probably occurring in the fuel cell stack during an inactive phase of the fuel cell stack, and initiating a protective measure for reducing the carbon corrosion in the fuel cell stack on the basis of the corrosion value.

A voltage control system includes: a converter controlling portion; a current value acquisition portion; and a voltage value acquisition portion. The converter controlling portion sets a duty ratio in a present cycle by adding an addition term to a feedforward term, the addition term being determined by use of a current deviation, which is a difference between a target value of an output current in the present cycle and a current measured value in a previous cycle, and the duty ratio in the previous cycle, the addition term being corresponding to an increase of the output current in the present cycle.

A fuel cell system includes a first converter to convert power, which is output from a fuel cell stack or a battery, into power in a specific level, a second converter to convert power which is input to or output from the battery, a power relay assembly to control power flow between a super capacitor and the first converter, and a controller to control outputs of the first converter and the second converter, depending on a starting state or an operating state of the fuel cell system, and to control an operation of the power relay assembly.

A hydrogen leakage detection system for detecting a hydrogen leakage in a fuel cell system includes: an outer shell configured to accommodate a hydrogen flow section; a hydrogen sensor; and a porous sheet disposed to delimit at least a part of a space within the outer shell and allowing permeation of hydrogen through the porous sheet in a thickness direction thereof. The hydrogen flow section is disposed in a region below the porous sheet, and the hydrogen sensor is disposed in a region above the porous sheet.

A hydrogen storage system and a method for controlling the same includes a detection device that detects a first hydrogen pressure decompressed by a regulator using a first pressure sensor in the hydrogen storage system and a processor that predicts generation of noise at the regulator based on a change rate of the first hydrogen pressure during hydrogen charging and stops the hydrogen charging.