Patent application number | Description | Published |
20140081497 | SYSTEM AND METHOD FOR CONTROLLING FUEL CELL SYSTEM - Disclosed is a system and method for controlling a fuel cell system. More specifically, a fuel cell demand current is calculated based on a driver demand current calculated from a driver demand torque. Then a target flow rate-1 of air to be supplied to a fuel cell stack is calculated based on the fuel cell demand current and a target stoichiometric ratio (SR) of air. The target flow rate-1 is then compensated for using the target SR, an RPM command value of an air blower is calculated based on a compensated target flow rate-2 and the amount of air currently measured. The operation of the air blower is subsequently controlled based on the calculated RPM command value. | 03-20-2014 |
20140170515 | APPARATUS AND METHOD FOR CONTROLLING COOLANT TEMPERATURE OF FUEL CELL SYSTEM - Disclosed is an apparatus and method that controls a coolant temperature of a fuel cell system, which can improve fuel efficiency by performing a multi-point temperature control based on the power of a vehicle, the outdoor temperature for each season, etc. | 06-19-2014 |
20140336855 | METHOD OF CONTROLLING OPERATION MODE OF FUEL CELL IN FUEL CELL VEHICLE - Disclosed is a method of controlling an operation mode of a fuel cell in a fuel cell vehicle wherein, (a) when a driver-demanded torque is lower than a first torque, and a current state of charge (SOC) in a battery is higher than a first SOC, the operation mode of the fuel cell is converted to a stop mode, and (b) when the driver-demanded torque is higher than a second torque, or the current SOC in the battery is lower than a second SOC, the operation mode is converted to a start mode, wherein the second torque is higher than the first torque and the second SOC is lower than the first SOC. | 11-13-2014 |
20140368028 | SYSTEM AND METHOD FOR EMERGENCY STARTING OF FUEL CELL VEHICLE - 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. | 12-18-2014 |
20150155574 | DRIVING CONTROL METHOD AND SYSTEM OF FUEL CELL SYSTEM - A driving control method and system of a fuel cell system are provided. The method includes determining, by a controller, a dry state of a fuel cell stack and stopping an air blower, which supplies air to the fuel cell stack, using different processes based on whether the fuel cell stack is in the dry state. Accordingly, the time for which an open circuit voltage (OCV) is maintained is reduced and durability of the fuel cell is improved by preventing dry-out of the fuel cell stack. | 06-04-2015 |
20150180069 | APPARATUS AND METHOD FOR CONTROLLING HYDROGEN PURGING - An apparatus and method for controlling hydrogen purging are provided. The apparatus includes a purging valve that is provided for an outlet disposed adjacent to an anode of a fuel cell stack and is configured to adjust an outflow of water from the fuel cell stack. In addition, a controller is configured to adjust an opening of the purging valve according to a charge capacity obtained by integrating a current capacity of the fuel cell stack. The controller is configured to calculate the charge capacity by multiplying the current capacity of the fuel cell stack by a scale factor when a load for an output current of the fuel cell stack is less than a first reference load which is preset. | 06-25-2015 |
20150188163 | CONDENSED WATER REMOVING METHOD AND APPARATUS OF GAS DIFFIUSION LAYER AND CATALYST LAYER OF FUEL CELL AND APPARATUS - Disclosed are a method and an apparatus for removing condensed water in a gas diffusion layer and a catalyst layer of a fuel cell. The method comprises steps of: a step of determining whether the condensed water is generated in the gas diffusion layer and the catalyst layer of the fuel cell; a step of reducing and supplying an amount of air supplied to a cathode of the fuel cell at a predetermined level, when it is determined that the condensed water is generated in the gas diffusion layer and the catalyst layer in the step of determining; a step of measuring a temperature of a stack of the fuel cell; and a step of increasing the amount of air supplied to the cathode of the fuel cell to an amount of air prior to being reduced at the predetermined operation level, when the measured temperature of the stack of the fuel cell is elevated to a predetermined temperature. | 07-02-2015 |
20150288014 | APPARATUS AND METHOD FOR CONTROLLING COOLANT TEMPERATURE OF FUEL CELL SYSTEM - Disclosed is an apparatus and method that controls a coolant temperature of a fuel cell system, which can improve fuel efficiency by performing a multi-point temperature control based on the power of a vehicle, the outdoor temperature for each season, etc. | 10-08-2015 |