A method increases the safety and/or the reliability of the operation of a fuel cell stack. The method determines that the fuel cell stack is in a space with a reduced air exchange rate. The method determines consumption information with respect to an oxygen consumption of the fuel cell stack within an interval of time. The method determines, on the basis of the air exchange rate, inflow information with respect to an amount of oxygen which was supplied to the space within the interval of time. The method determines an estimated value for an oxygen content of air in the space on the basis of the consumption information and on the basis of the inflow information.

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.

A CEMS server obtains meteorological information and hydrogen station information. The CEMS server predicts a power demand of a microgrid after a designated period. When the power demand of the microgrid after the designated period exceeds contract power and when an amount of electric power to be reduced exceeds a prescribed value, the CEMS server generates a hydrogen addition notification and transmits the generated hydrogen addition notification to an FCEV and/or a communication terminal. The amount of electric power to be reduced is a difference between the contract power and the power demand.

A charging system may include a plurality of fuel cell stacks configured to receive hydrogen from a hydrogen supply unit and generate power, a plurality of charging dispensers configured to be electrically connected to a load device and configured to provide power upon connected to the load device, and a controller configured to distribute and supply the power generated by the plurality of fuel cell stacks to a charging dispenser to which the load device is connected, to compare a total available power amount of the plurality of fuel cell stacks with a total power demand amount of the charging dispenser to which the load device is connected, and to control a power generation amount of each of the plurality of fuel cell stacks according to a result of the comparing.

Methods and systems may provide for technology to detect an unbalanced degradation among a plurality of fuel cells in an automotive system and apply an unbalanced control across the plurality of fuel cells based on the unbalanced degradation. In one example, the unbalanced control balances the degradation among the plurality of fuel cells.

A fuel cell power system includes a plurality of fuel cell systems that include a fuel cell stack and a fuel tank for storing fuel gas and supplying the fuel gas to the fuel cell stack. The fuel cell power system includes an auxiliary machine that is connected to be electrically switchable to any of the plurality of fuel cell system, and consume electric power output from the plurality of fuel cell systems. The fuel cell power system includes a control device that switches the fuel cell system to which the auxiliary machine is connected, on the basis of the states of the plurality of the fuel cell systems.

An electric power supply system of an embodiment includes a plurality of fuel cell systems having fuel cell stacks, a controller configured to control to perform stable output electric generation in one fuel cell system having one fuel cell stack, in which a degraded state of an electrode is relatively large, among the plurality of fuel cell stacks, and to perform transient response electric generation in other fuel cell system having other fuel cell stack, in which a degraded state of an electrode is relatively small, and a cell voltage sensor.

A mobile emergency power generation and vehicle propulsion power system, method, and apparatus for full-scale, clean fuel, electric-powered vehicles having a fuel cell module including a plurality of fuel cells working together to process oxidizers including gaseous oxygen from the atmosphere or local oxygen supply and fuels including gaseous hydrogen or gaseous hydrogen from liquid hydrogen, to collect electrons from the plurality of hydrogen fuel cells to supply voltage and current to and control an amount and distribution of electrical voltage and torque or current for use with power inverters and power outlets for exterior use, and for propulsion systems of the vehicle itself.

A mobile emergency communication and vehicle propulsion power system, method, and apparatus for full-scale, clean fuel, electric-powered vehicles having a fuel cell module including a plurality of fuel cells working together to process oxidizers including gaseous oxygen from the atmosphere or local oxygen supply and fuels including gaseous hydrogen from liquid hydrogen, to collect electrons from the plurality of hydrogen fuel cells to supply voltage and current to and control an amount and distribution of electrical voltage or current for use in collecting and amplifying communications signals to function as a cell site repeater and for propulsion systems of the vehicle itself. The system can accordingly be deployed at a location to provide wireless communication functionality in remote areas or areas cut off due to natural disaster.

A fuel cell system including a fuel cell, an air compressor that supplies oxidant gas to the fuel cell, an upstream supply pipe provided with the air compressor, a downstream supply pipe connected to the upstream supply pipe and the fuel cell, an upstream discharge pipe connected to the fuel cell, a downstream discharge pipe connected to the upstream discharge pipe, a bypass pipe, a valve mechanism configured to be switchable between a supply state and a bypass state, and a controller configured to control the air compressor, the valve mechanism, and a power generation state of the fuel cell.