Patent application number | Description | Published |
20110097637 | PURGE SYSTEM FOR FUEL CELL WITH IMPROVED COLD START PERFORMANCE - The present invention provides a purge system for a fuel cell, which can reduce the time required to thaw a frozen valve during cold start-up and reduce the whole start-up time, thus improving the cold start performance. In preferred embodiments, the present invention provides a purge system for a fuel cell with improved cold start performance, the system preferably including a main pipe connected to a purge gas outlet of a fuel cell stack to discharge a purge gas purging the fuel cell stack and impurities; an auxiliary pipe branched from the main pipe; a purge valve installed in each of the main pipe and the auxiliary pipe to perform an purge operation; a cut-off valve installed at an upstream side of the purge valve in the auxiliary pipe; and a controller for controlling the operation of the purge valves and the cut-off valve. | 04-28-2011 |
20110115491 | METHOD FOR DETECTING ICE BLOCKING OF FUEL CELL STACK AND CONTROLLING FUEL CELL VEHICLE USING THE SAME - The present invention provides a method for determining the occurrence of ice blocking in an electrode surface in real time by analyzing minimum cell voltages of a fuel cell stack and, at the same time, distinguishing the occurrence of ice blocking in an anode from the occurrence of ice blocking in a cathode. | 05-19-2011 |
20120122001 | METHOD FOR DETERMINING AMOUNT OF REACTANT GASES SUPPLIED TO FUEL CELL SYSTEM - The present invention provides an improved method for determining the amount of reactant gases supplied to a fuel cell system to ensure a stable supply of reactant gases to a fuel cell stack. In particularly, the present invention estimates an output current value of a fuel cell stack by detecting the state of charge of an electricity storage device connected in parallel to the fuel cell stack; measures a target current value according to the amount of output required by a driver; determines the amount of reactant gases to be supplied by comparing the estimated output current value and the target current value; and supplies the determined amount of reactant gases to the fuel cell stack. | 05-17-2012 |
20120141895 | SYSTEM AND METHOD FOR CONTROLLING OPERATION OF FUEL CELL HYBRID SYSTEM - The present invention provides a hybrid fuel cell system that is configured to determine if an idle stop condition has been satisfied during a normal operation mode of the hybrid fuel cell system, cut off air supply to a fuel cell to stop power generation of the fuel cell and reduce a voltage which the fuel cell outputs in response to determining that the idle stop condition has been satisfied. The voltage of a bidirectional converter, connected between a battery and a bus terminal is reduced and the output of the fuel cell is controlled, based on a first predetermined value and maintained at that first predetermined value. Subsequently, the battery is charged via the output current of the fuel cell generated by maintaining the reduced voltage of the bidirectional converter. | 06-07-2012 |
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 |
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 |
20150343903 | SAFETY SYSTEM OF FUEL CELL VEHICLE AND CONTROL METHOD FOR THE SAME - Disclosed are a safety system of a fuel cell vehicle and a control method for the safety system. A safety system of a fuel cell vehicle using a fuel cell and a high voltage battery as a power source may include: a power switch disposed on a power wire connecting the power source and a power load to each other; an insulation resistance measuring device measuring an insulation resistance between the power wire and a chassis; and a controller controlling an operation of the power switch based on a measured insulation resistance measured by the insulation resistance measuring device. When the measured insulation resistance is equal to or less than a reference resistance, the controller enters a safe mode and the power switch is turned off to thereby block power supplied to the power load. | 12-03-2015 |
20160006049 | SYSTEM AND METHOD OF CONTROLLING AIR BLOWER FOR FUEL CELL VEHICLE - A system and method of controlling an air blower for a fuel cell vehicle are provided. The method includes determining an operation amount of an air blower to secure a sufficient air flow rate under present operating conditions and obtaining information regarding clogging of an air channel or information regarding a back pressure using the operation amount of the air blower. In addition, a maximum operating range of the air blower is changed based on whether a present state is an air channel-clogged state or a back pressure-increased state. | 01-07-2016 |