Hyundai Motor Company

Kia Motors Corporation

Kia Corporation

Yei Sik Jeon

Hyun Jae Lee

Ik Jae Son

Jong Hyun Lee

Ik Joon Son

Hyo Seop Kim

Deuk Kuen Ahn

Dae Jong Kim

Sang Uk Kwon

Sung Gone Yoon

Bu Kil Kwon

Sung Bum Choi

Heon Joong Lee

Deuk Keun Ahn

A fuel cell operating system including an air compressor disposed on an air supply line and configured to compress an oxidation gas to be supplied to a fuel cell stack and supply the compressed air to a fuel cell inlet side, an air discharge line configured to discharge the oxidation gas from the fuel cell stack, a bypass line configured to branch off from the air discharge line through a valve, connected to the air supply line, and configured to resupply the discharged oxidation gas to the fuel cell inlet side, and a control unit configured to control a flow rate of the oxidation gas to be supplied to the fuel cell stack by controlling the valve on the bypass line depending on a cell ratio value which is a ratio of the fuel cells each being applied with a voltage lower than a first voltage among the fuel cells.

Fuel cell operating system and method of controlling operation of fuel cell

A power plant thermal-management-system control method for controlling thermal management systems in PMCs is provided. The thermal management systems are operated based on coolant temperatures of the PMCs of a power plant of a fuel cell vehicle to prevent the temperatures of the PMCs from deviating from a reference range, which in turn prevents degradation of fuel cells.

Method for controlling thermal management systems of power plant

An air supply control method of a fuel cell is provided. The method includes adjusting an opening of a pressure control valve in accordance with an opening map stored in advance. The pressure control valve is disposed at an outlet of a fuel cell of an air supply line for supplying air to the fuel cell and discharging air and adjusts air pressure in the air supply line. The method further includes determining whether an air pressure state of the air supply line is normal after adjusting the opening of the pressure control valve and operating the pressure control valve at a predetermined opening in response determining that the air pressure state of the air supply line is abnormal.

Air supply control method and control system for fuel cell

A fuel cell purging method is provided to effectively prevent fuel cell deterioration and degradation of durability of the fuel cell by performing hydrogen purging at a point in time at which negative pressure of an anode peaks after a fuel cell vehicle is stopped. The fuel cell purging method includes stopping the driving of a fuel cell vehicle and continuously measuring pressure of an anode of a fuel cell after the fuel cell vehicle is stopped. Additionally, hydrogen is supplied to the anode when the measured pressure of the anode reaches a negative pressure peak time point.

Fuel cell purging method

A system and method of controlling a performance of a fuel cell stack is provided. In particular, the output performance of the fuel cell stack is determined by comparing the difference between an initial voltage and a voltage after a predetermined time lapses with the difference between the initial voltage and a preset minimum voltage.

System and method for controlling performance of fuel cell stack

A fuel cell system includes a fuel cell stack having a cathode and an anode, a humidifier configured to humidify air that is to be supplied to the cathode, an air supply unit configured to supply the air to the humidifier, and a controller. The controller is configured to adjust a flow rate of the air supplied from the air supply unit, based on a supply of the humidifier, to prevent flooding of the fuel cell stack.

Fuel cell system for preventing flooding of a fuel cell stack

A fuel cell purging control method for controlling hydrogen purge of a fuel cell including a stack having an anode and a cathode, an air supply device having an air supply line supplying air to the cathode of the stack, a back pressure adjusting valve adjusting back pressure of the air supply device, and a hydrogen supply device supplying hydrogen to the anode of the stack, includes steps of: determining hydrogen purge of the fuel cell while the fuel cell is being normally operated, reducing back pressure of the air supply line of the fuel cell when the hydrogen purge is determined, and purging hydrogen in the anode of the fuel cell for a preset period of time after the step of reducing the back pressure.

Fuel cell purging control method

A control method and system of a fuel cell system is provided. The control method includes detecting, by a controller, a voltage of a fuel cell stack when power generation of a fuel cell is stopped while a fuel cell vehicle is being driven. In addition, hydrogen supply pressure at an anode side is adjusted based on a variation in the detected voltage.

Control method and system of fuel cell system

An apparatus and method for controlling a purge valve of a fuel cell vehicle are provided to reduce a consumption amount of hydrogen and improve fuel efficiency. In particular, whether oxygen concentration in a channel of an anode of a fuel cell stack exceeds a reference value is estimated while restarting the vehicle after the vehicle is parked. Then, an open time of a purge valve is adjusted based on a parking time of a vehicle when the hydrogen concentration is greater than the reference value.

Apparatus and method for controlling purge valve of fuel cell vehicle

A perceiving method and system of a stack state for a fuel cell system is provided. The method includes determining whether a vehicle provided with the fuel cell system is started and calculating a time until first condensate water is discharged through a condensate water discharging valve provided in the fuel cell system after the vehicle starts. Then, an average time until the first condensate water is discharged after the vehicle starts, at the previous starting of the vehicle is calculated over a predetermined number of times. The two calculated times are compared to determine the state of the stack or cathode of the fuel cell system without requiring additional separate components.

Perceiving method and system of stack state for fuel cell system

A system and method of controlling fuel cell system is provided that simultaneously drains condensation and purges hydrogen via single valve. In particular, condensate water is drained by opening a drain-purge valve at a point in time at which a production amount of the condensate water exceeds a capacity of a water trap. An opening time of the drain-purge valve is then determined depending on a hydrogen concentration of an anode side and a target hydrogen concentration after the draining the condensate water. Hydrogen is then purged by maintaining the drain-purge valve in a state in which it is opened for the determined opening time.

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Seoul, South Korea

Yei Sik Jeon