Abstract: The present invention provides a fuel cell hybrid system having a multi-stack structure, which maintains the voltage of a fuel cell at a level lower than that of an electricity storage means (supercapacitor) during regenerative braking so that the fuel cell does not unnecessarily charge the electricity storage means, thereby increasing the amount of recovered energy and improving fuel efficiency.

Abstract: The present invention provides a current collector of an end plate for a fuel cell and a method for controlling the same, in which a plurality of current collector plates having different resistance values is mounted on an end plate so that the current of a fuel cell is consumed during cold start and during low power operation to improve cold startability of the fuel cell and, further, the durability of a membrane electrode assembly (MEA) is improved due to an increase in voltage during low power operation.

Abstract: The present invention provides a power configuration system for a fuel cell hybrid vehicle and a method for controlling the same, in which a second blocking diode is installed in a main bus terminal at an output terminal of a fuel cell (in front of a first blocking diode) separately from the existing first blocking diode installed in the main bus terminal, the positions of high voltage components for driving the fuel cell are changed from the rear of the first blocking diode to the front of the first blocking diode, and the operations of the high voltage components are appropriately controlled during regenerative braking such that the voltage of the fuel cell may be maintained below that of the supercapacitor.

Abstract: The present invention provides an idle stop-start control method of a fuel cell hybrid vehicle including a fuel cell as a main power source and a storage means as an auxiliary power source, in which air and hydrogen supply is cut off during low power operation where the efficiency of the fuel cell is low and during regenerative braking such that residual oxygen and hydrogen are consumed to drop the voltage of a fuel cell stack, thus stopping the operation of the fuel cell.

Abstract: The present invention provides a method for controlling output of a fuel cell to improve fuel efficiency of a fuel cell hybrid vehicle, in which the fuel cell is operated at a constant power at a maximum efficiency point, wherein the fuel cell and a storage means are directly connected if the output and energy of the storage means is insufficient, and the power generation of the fuel cell is stopped when the level of energy of the storage means is increased during stopping or during low power operation such that the fuel cell is intensively operated at the maximum efficiency point, thus improving the fuel efficiency of the fuel cell and the efficiency of the fuel cell system.

Abstract: Disclosed herein is a battery management system for vehicles, comprising: a plurality of slave control units, each of which manages a state of charge of a corresponding battery cell; and a master control unit interfacing with the slave control units to manage a state of charge of all the battery cells.

Abstract: A method for determining an effective voltage of a battery includes detecting a battery voltage at a predetermined interval, and counting a number of times the battery voltage is detected within a series of predetermined voltage ranges. The method also includes calculating a ratio of the change of the counted number with respect to a change of the battery voltage, and determining a first peak point of the calculated ratio.

Abstract: A system for measuring a current of a battery for an electric vehicle includes a current transducer, a voltage-to-PWM (PWM (Pulse Width Modulation) converter, and a power supply unit. The current transducer measures a battery current during a charge or a discharge of the battery, and generates a corresponding voltage signal. The voltage-to-PWM converter converts the voltage signal input generated by the current transducer to a PWM signal. The power supply unit supplies power to the current transducer.

Abstract: A method for managing temperature of a battery of an electric vehicle is provided which comprises: determining whether a value of a state of charge of a battery is less than a predetermined value; regulating temperature of the battery such that the temperature of the battery approaches a temperature for a maximum charge power of the battery, if the value of the state of charge of the battery is less than the predetermined value; and regulating temperature of the battery such that the temperature of the battery approaches a temperature for a maximum charge amount of the battery, if the value of the state of charge of the battery is greater than the predetermined value.

Abstract: A system for measuring a current of a battery for an electric vehicle includes a current transducer, a voltage-to-PWM (PWM (Pulse Width Modulation) converter, and a power supply unit. The current transducer measures a battery current during a charge or a discharge of the battery, and generates a corresponding voltage signal. The voltage-to-PWM converter converts the voltage signal input generated by the current transducer to a PWM signal. The power supply unit supplies power to the current transducer.

Abstract: A method for determining an effective voltage of a battery includes detecting a battery voltage at a predetermined interval, and counting a number of times the battery voltage is detected within a series of predetermined voltage ranges. The method also includes calculating a ratio of the change of the counted number with respect to a change of the battery voltage, and determining a first peak point of the calculated ratio.

Abstract: When charging of a battery is started, a voltage of each module being charged is detected, and then an average voltage and at least one of a maximum voltage and a minimum voltage of the modules are calculated. Subsequently, if an absolute value of a difference between the average voltage and at least one of the maximum and the minimum voltages is greater than a predetermined reference value, it is determined that the battery may be malfunctioning. If it is determined that the battery may be malfunctioning, a charging mode is changed to a safer mode and a warning of the possible malfunction is given.

Abstract: Disclosed is a battery module structure for an electric vehicle comprising a plurality of battery cells arranged adjacent to one another to form a group of battery cells; an end plate provided on each end of the group of the battery cells; one or more bands provided on opposing sides of the group of the battery cells, the bands being fastened to the end plates; an air plate interposed between each pair of battery cells; and a fan unit provided on top of the battery module, the fan unit blowing air onto the battery module.

Abstract: When charging of a battery is started, a voltage of each module being charged is detected, and then an average voltage and at least one of a maximum voltage and a minimum voltage of the modules are calculated. Subsequently, if an absolute value of a difference between the average voltage and at least one of the maximum and the minimum voltages is greater than a predetermined reference value, it is determined that the battery may be malfunctioning. If it is determined that the battery may be malfunctioning, a charging mode is changed to a safer mode and a warning of the possible malfunction is given.

Abstract: Disclosed is a battery module structure for an electric vehicle comprising a plurality of battery cells arranged adjacent to one another to form a group of battery cells; an end plate provided on each end of the group of the battery cells; one or more bands provided on opposing sides of the group of the battery cells, the bands being fastened to the end plates; an air plate interposed between each pair of battery cells; and a fan unit provided on top of the battery module, the fan unit blowing air onto the battery module.

Abstract: A resonant DC link converter which is specifically adapted for driving a switched reluctance motor (SRM) using low power (VA) rated switches, includes an input circuit providing a DC supply voltage, a resonating inductance (connected to the switched input circuit) for generating a resonating DC link current, and an output converter circuit synthesizing a multi-phase AC output signal to power a respective phase winding of the SRM. A controller switches the switch devices of the input circuit and output converter circuits in a predetermined sequence.

Abstract: A simultaneous recovery commutation current source inverter is provided by connecting three AC output terminals of a main inverter and an auxiliary inverter in parallel with each other and to three terminals of an induction motor, providing a high AC impedance DC current source through inductors connected in series to a variable DC electric source so that DC electric power is supplied to both sides of a main DC bus of the main inverter, providing a low AC impedance DC voltage source by supplying DC electric power to both sides of an auxiliary DC bus of the auxiliary inverter through a rectifying circuit from the respective connecting points of the main inverter, auxiliary inverter and the three motor terminals. Snubber circuits may be added to the respective semiconductor elements for safe switching operation.