Hyundai Motor Company

Kia Motors Corporation

Soon Il Jeon

Sang Uk Kwon

Dong Hun Lee

Dae Jong Kim

Nam Woo Lee

Kyu Il Lee

Jung Hwan Ryu

Sae Hoon Kim

Sang Hoon Lee

Joon Yong Lee

Sung Jin Chung

Seong Pil Ryu

Ho Sung Kang

Min Woo Kang

Seung Hwan Lee

Jae Won Jung

Sung Do Kim

JuHan Kim

Dong Hoon Kang

Young Bum Kum

Chang Seok You

Heon Ju Lee

Sung Gone Yoon

Kyung Won Suh

Yong Sun Park

Seo Ho Choi

Boung Ho Min

Seon Hak Kim

Sun Soon Park

Ji Sang Park

The present invention provides a relative humidity and condensed water estimator for a fuel cell and a method for controlling condensed water drain using the same. Here, the relative humidity and condensed water estimator is utilized in control of the fuel cell system involving control of anode condensed water drain by outputting at least two of signals comprising air-side relative humidity, hydrogen-side relative humidity, air-side instantaneous or cumulative condensed water, hydrogen-side instantaneous or cumulative condensed water, instantaneous and cumulative condensed water of the humidifier, membrane water contents, catalyst layer oxygen partial pressure, catalyst layer hydrogen partial pressure, stack or cell voltage, air-side catalyst layer relative humidity, hydrogen-side catalyst layer relative humidity, oxygen supercharging ratio, hydrogen supercharging ratio, residual water in a stack, and residual water in a humidifier.

Controller for estimating relative humidity and condensed water, and method for controlling condensed water drain using the same

A fuel cell system having a fuel cell control module (FCU) and a method of controlling the same are provided. The method includes selecting one of at least one control parameter and learning system efficiency at each of at least one configurable candidate value of the selected control parameter based on supplied current by driving the fuel cell system. Additionally, the method includes determining a value of the selected control parameter by comparing the system efficiency at each of the at least one configurable candidate value of the selected control parameter with system efficiency corresponding to an initial performance index, at each of at least one predetermined representative current point. Thereby, efficiency of the fuel cell system is improved.

Fuel cell system and method of controlling the same

A method of calibrating an offset of a pressure sensor, by which an offset of a sensing value of a pressure sensor, which detects a pressure of hydrogen in a fuel cell system, is accurately calibrated. The method includes receiving, by a controller, a sensing value of a pressure sensor which detects a hydrogen pressure in a state where a hydrogen supply starts after a start of a fuel cell system; counting, by the controller, a time for which the sensing value of the pressure sensor increases from a first pressure Pto a second pressure P; calculating, by the controller, an offset value corresponding to the counted time by use of stored setting data; and calibrating, by the controller, a subsequent sensing value of the pressure sensor by the calculated offset value in real time when the offset value is calculated.

Method of calibrating offset of pressure sensor

A fuel cell vehicle system is provided. The system includes a fuel cell and a first motor that is connected to the fuel cell via a first bus terminal and driven by power supplied from the fuel cell and that provides power to driving wheels of the vehicle. A high voltage battery stores or supplies power by charging or discharging. Additionally, a second motor is connected to the high voltage battery via a second bus terminal and driven by power supplied from the high voltage battery and provides power to the driving wheels of the vehicle.

Fuel cell vehicle system and method of controlling the same

A control method of a motor rotation speed may include calculating a q-axis potential difference of a synchronous coordinate system for controlling a q-axis current of the synchronous coordinate system based on a target rotation speed of a motor and a measured rotation speed value of the speed sensor, calculating a voltage command of the synchronous coordinate system based on the calculated q-axis potential difference of the synchronous coordinate system, and controlling an inverter connected to the motor according to the calculated voltage command of the synchronous coordinate system.

Control method and control system of motor rotation speed

A combined cooling system for a fuel cell vehicle and a control method thereof is capable of improving cooling performance and fuel efficiency by using interlocking control in various situations and by additionally adding a bypass loop and a control valve to a main line connecting a fuel cell, an electric component, a radiator, and a pump.

Cooling system including bypass for electric component for fuel cell vehicle and control method for same

A safety apparatus uses a fuel cell and a high voltage battery as a power source, and includes: a first voltage sensor that measures a voltage of a positive side of a voltage bus; a second voltage sensor that measures a voltage of a negative side of the voltage bus; and a controller that determines an electrical insulation between the positive side of the voltage bus and the electrical chassis based on the voltage of the positive side of the voltage bus and determines an electrical insulation between the negative side of the voltage bus and the electrical chassis based on the voltage of the negative side of the voltage bus.

Safety apparatus of fuel cell vehicle and method for controlling the safety apparatus

A fuel cell system and a method of controlling the fuel cell system are provided. The fuel cell system includes at least one bypass valve that is disposed between a passage in an inlet of a fuel cell stack and a bypass passage that is branched from the passage within the inlet and that is connected to a discharge port of the fuel cell stack. In addition, a controller bypasses air supplied from an air blower to the discharge port by adjusting an opening degree of the bypass valve.

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.

System and method for emergency starting of fuel cell vehicle

The present invention provides a method for controlling the temperature of a fuel cell system by controlling the rotational speeds of a coolant pump and a cooling fan based on the coolant outlet temperature, the amount of heat generated by a fuel cell stack, etc. In particular, the present invention controls the temperature of a fuel cell system by utilizing a controller which receives a coolant outlet temperature from a sensor in a state where a reference temperature for each stage is determined with respect to the coolant outlet temperature and a target rotational speed for each stage is determined based on the coolant outlet temperature. Then the controller performs proportional integral (PI) control with respect to each rotational speed of a coolant pump and a cooling fan at the target rotational speed for each stage determined based on the current coolant outlet temperature detected by the water temperature sensor.

Method for controlling temperature of fuel cell system

A method for controlling a startup of a fuel cell system is provided. The method includes comparing a voltage generated in a fuel cell stack when hydrogen is supplied to a fuel electrode of the fuel cell stack for a set period of time with a first reference voltage. A voltage of a unit cell of the fuel cell stack is compared with a second reference voltage for load connection when the voltage generated in the fuel cell stack is higher than the first reference voltage. A load is connected to the fuel cell stack when the voltage of the unit cell of the fuel cell stack is higher than the second reference voltage for load connection.

Method for controlling startup of fuel cell system

A method and a system are provided for controlling an air intake of a fuel cell vehicle. The method includes calculating a value for basic air intake of a fuel cell based on a driver requirement and calculating a value of motor current requirement based on the driver requirement. A rate-of-change is calculated of the value of motor current requirement and a value for supplementary air intake is calculated by multiplying the rate-of-change of the value of motor current requirement by a gain value. A value for final air intake is then calculated by adding the value for basic air intake and the value for supplementary air intake. An air blower of an air intake system of the fuel cell is operated with the value for final air intake.

Growing community of inventors

Gyeonggi-do, South Korea

Soon Il Jeon