Hyundai Motor Company

Kia Motors Corporation

Kia Corporation

Seong Cheol Jeong

Jae Won Jung

Jong Gyun Kim

Jun Young Park

Dae Jong Kim

Kyu Il Lee

Dong Hun Lee

Hyun Jae Lee

Ki Chang Kim

Kyung Won Suh

Boung Ho Min

Joo Yeon Kim

Hyo Jin Park

Hak Yoon Kim

Jae Yeong Yoo

Hyo Seop Kim

Jae Kwon Jung

Sang Soo Eun

Bon Yong Koo

Seung Hwan Lee

A system and method for calibrating an offset of a pressure sensor for a fuel cell including one or more fuel cell modules in which power generation is individually controlled by independently supplying hydrogen or air to a fuel cell stack includes a pressure sensor to sense a pressure of the hydrogen supplied to the fuel cell stack, a monitoring unit which monitors whether offset calibration of the pressure sensor of the one or more fuel cell modules is required, a power generation control unit which individually controls the one or more fuel cell modules to continue or stop power generation, and a calibration control unit which calibrates the offset of the pressure sensor of the fuel cell module in a state where power generation is stopped based on a preset offset calibration period or the monitoring of the monitor unit as to whether calibration is required.

System and method for calibrating offset of pressure sensor for fuel cell

Disclosed are a device and a method for controlling a fuel cell system, in which during operation of the fuel cell system, the device and method determine a minimum motoring current limit value applied to a motor for driving a fuel cell vehicle by varying an output current limit threshold value of the fuel cell stack by determining an available output current of the stack and by varying an available voltage lower limit threshold value of the stack by determining an available operating voltage of the stack, thereby preventing the fuel cell vehicle from rattling due to excessive limitation of output current of the stack. They also control the pressures of an anode and a cathode of the stack by monitoring whether the performance of the stack is degraded as limitation of output current of the stack is suppressed, thereby suppressing degradation of the performance of the stack.

Device and method for controlling fuel cell system

A startability improving system of a fuel cell vehicle is disclosed. The startability improving system includes a high-voltage battery and a fuel cell connected to a main bus stage of the vehicle, to provide driving energy, and a controller configured to determine whether there is a possibility that operating voltages of the high-voltage battery and the fuel cell overlap each other when the high-voltage battery and the fuel cell are connected to the main bus stage, in response to determination that there is a possibility that the operating voltages of the high-voltage battery and the fuel cell overlap each other, the controller configured to vary the operating voltage of the high-voltage battery or the fuel cell, and then to connect the high-voltage battery and the fuel cell to the main bus stage.

System for improving startability of fuel cell vehicle and control method thereof

In an embodiment a regenerative braking control apparatus includes a fuel cell stack configured to provide energy to a driving motor of the vehicle, a cathode oxygen depletion (COD) heater configured to remove gas remaining in the fuel cell stack, a high voltage battery configured to supply power to the driving motor or to be charged by using power generated by the driving motor through regenerative braking and a processor configured to calculate a reference state-of-charge (SOC) based on an expected driving route, to calculate a limit power for the COD heater based on an operating state of a cooling device for cooling the COD heater when a SOC of the high voltage battery is greater than or equal to the reference SOC and to calculate consumable power of the COD heater based on the limit power of the COD heater.

Apparatus and method for controlling regeneration of fuel cell vehicle

A method and a system for diagnosing a failure of a temperature sensor for a fuel cell are provided. The method includes calculating a heating value that is generated at a fuel cell stack during a predetermined diagnosis time and then calculating a temperature variation of the fuel cell stack from the calculated heating value. A failure of a temperature sensor configured to measure a temperature of the fuel cell stack is then detected based on the calculated temperature variation of the fuel cell stack.

Method and system for diagnosing failure of temperature sensor for fuel cell

A device for diagnosing a valve failure of a fuel cell system is capable of accurately and quickly determining whether an integrated valve in a fuel cell system is operated abnormally, and preventing problems caused by the operation abnormality of the integrated valve.

Device for diagnosing valve failure of fuel cell system

Proposed are a fuel cell system and a method of controlling the fuel cell system. The fuel cell system includes: a hydrogen supply unit connected to a hydrogen inlet side of a fuel cell stack, with a supply valve and a sensor being provided in the hydrogen supply unit; a hydrogen discharge unit connected to a hydrogen outlet side of the fuel cell stack, with a water trap and a purge valve being provided in the hydrogen discharge unit; and a controller configured to calculate an amount of hydrogen discharged through the purge valve from an amount of hydrogen supplied to the fuel cell stack and an amount of hydrogen consumed therein, and to perform compensation control of the supply valve when the amount of the discharged hydrogen is at or above a reference value.

Fuel cell system and method of controlling same

Provided are a method and system for correcting an offset of a hydrogen pressure sensor. The method includes constantly supplying the hydrogen to the fuel cell stack, determining whether an offset of the hydrogen pressure sensor needs to be corrected based on a stop time before the fuel cell stack starts and a magnitude of an output voltage of the fuel cell stack, calculating an offset correction value when the offset of the hydrogen pressure sensor needs to be corrected, and correcting the offset of the hydrogen pressure sensor and performing the starting of the fuel cell stack.

Method and system for correcting offset of hydrogen pressure sensor

A control system and method for preventing a fuel cell from overheating are disclosed. The system includes: a fuel cell that generates electric power through reaction of fuel gas and oxidation gas; a cooling line in which a cooling medium flows and performs heat exchange with the fuel cell; a cooling pump installed on the cooling line and configured to circulate the cooling medium through the cooling line; a cooling controller that controls an operating state of the cooling pump on the basis of the temperature of the fuel cell or the cooling medium; and a power generation controller that limits power generation of the fuel cell on the basis of the operating state of the cooling pump.

Control system and method for preventing overheating of a fuel cell

The present disclosure relates to a method of recovering performance of a fuel cell stack in a fuel cell system of a vehicle. The method includes determining whether the fuel cell stack is in a state in which a stack performance recovery operation is possible based on information collected from the vehicle using a predetermined stack state determination criterion, determining whether the vehicle is in a state in which the stack performance recovery operation is possible based on operation information of a fuel cell system, and performing the stack performance recovery operation upon determining that the fuel cell stack is in the state in which the stack performance recovery operation is possible and that the vehicle is in the state in which the stack performance recovery operation is possible.

Method of recovering performance of fuel cell stack

A cooling control system includes: a fuel cell stack formed with a cooling flow path in which hydrogen and oxygen are received and reacted, respectively, and coolant flows between separators; a coolant circulation line connected with the cooling flow path of the fuel cell stack, and having the coolant flowing therein; a cooling pump connected to the coolant circulation line to circulate the coolant to cool the fuel cell stack; a heat generation amount estimator for estimating the heat generation amount of the fuel cell stack; a coolant estimator for estimating an amount of the coolant to cool the fuel cell stack based on the heat generation amount of the fuel cell stack; and a driving controller for controlling the operation of the cooling pump based on the estimated amount of the coolant.

Cooling control system and control method of fuel cell

A fuel cell temperature control apparatus includes: a driver propensity determination processor that determines a driver's propensity while a vehicle travels; a temperature control factor decision processor that determines a temperature control factor based on an ambient temperature and the driver's propensity to control the temperature of the fuel cell; and a storage that stores driver propensity determination information determined by the driver propensity determination processor.

Apparatus for controlling temperature of fuel cell and method thereof

A low flow control method for a fuel cell includes: determining whether or not the fuel cell enters a low flow control mode, dividing a low flow control operation into a plurality of low flow control stages upon determining that the fuel cell enters the low flow control mode, and controlling a power generation quantity of the fuel cell according to the low flow control stages.

Low flow control method and system for fuel cell

A thermal management system for a fuel cell includes: a fuel cell stack; a heater connected with the fuel cell stack in parallel through a coolant channel and configured to heat coolant; a pump circulating the coolant; a bypass valve controlling a flow rate of the coolant to be supplied to the fuel cell stack or the heater; a radiator allowing the coolant to exchange heat with external air; a heat dissipation fan supplying the external air to the radiator; a temperature control valve controlling the flow rate of the coolant flowing through the radiator; a temperature sensor disposed at an outlet of the fuel cell stack or an outlet of the heater; and a controller controlling the heater, the pump, the bypass valve, the heat dissipation fan, or the temperature control valve on the basis of temperature sensed by the temperature sensor.

Fuel cell thermal management system and control method of the same

A method and an apparatus are provided for controlling a cooling system of a fuel cell, wherein an output of the cooling system is determined by varying rising/falling gain values of a cooling system according to irreversible/reversible degradation degrees of the fuel cell and an output demand degree, whereby the cooling system is controlled according to the determined output.

Growing community of inventors

Suwon-si, South Korea

Seong Cheol Jeong