摘要:
The present invention provides a system for a fuel cell vehicle, capable of preventing an unnecessary error in calculating high potential avoidance power to calculate power for high potential avoidance with high accuracy. A fuel cell system 100 includes: a fuel cell 20 that receives the supply of reactant gas to generate power; a secondary battery 50 for storing part of the power generated by the fuel cell 20; calculation means 60 which, when surplus power for high potential avoidance is added to the output voltage of the fuel cell 20 to avoid a high potential, calculates high potential avoidance voltage to avoid the high potential by feedback control based on a deviation between power generation voltage of the fuel cell 20 and high potential avoidance target voltage; determination means 70 for determining whether the operating state of the fuel cell 20 corresponds to a prohibition condition A to prohibit updating of an integral term of the feedback control or a permission condition; and feedback control condition deciding means 80 for stopping the updating of the integral term when the operating state corresponds to the prohibition condition A or updating the integral term when the operating state corresponds to the permission condition.
摘要:
The control unit of the fuel cell system monitors the status of power generation of the fuel cell and calculates a total amount of the fuel gas consumption, based on the amount of power generated by the fuel cell, from a point in time when the supply gas pressure reaches a standard gas pressure. Another total amount of the fuel gas consumption is calculated based on a gas pressure change that corresponds to a decrease of the gas pressure from the standard gas pressure. Comparing two total amounts of the fuel gas consumptions, the evaluation is performed as whether the on-off valve in the fuel gas flow path from each of the fuel gas tanks to the fuel cell fails to be opened.
摘要:
A method and system for controlling a fuel cell vehicle are provided in which a bidirectional converter monitors a state of a fuel cell vehicle in real time to improve control responsiveness in a transient state of the fuel cell vehicle. The method includes receiving, by a bidirectional converter, a command for a current limiting value in the high voltage battery from the fuel cell controller while the fuel cell vehicle is driven. In addition, the bidirectional converter is configured to determine whether the fuel cell vehicle is switched to a predetermined mode and change the current limiting value of the high voltage battery. A predetermined control is performed by the bidirectional converter based on the changed current limiting value when the fuel cell vehicle is switched to the predetermined mode.
摘要:
A fuel cell system includes: an external load connected to a fuel cell; an electric power adjusting unit configured to adjust a generated electric power of the fuel cell in accordance with electric power consumption of the external load; a humidity control unit configured to control humidity of an electrolyte membrane in the fuel cell on the basis of the generated electric power of the fuel cell; an output voltage detecting unit configured to detect an output voltage of the fuel cell; and a cross leakage determining unit configured to cause the humidity control unit to increase the humidity of the electrolyte membrane when the fuel cell generates the electric power, the cross leakage determining unit being configured to determine whether a cross leakage amount increases or not on the basis of a change in the output voltage at that time.
摘要:
A control method for a fuel cell vehicle includes a failure determining step of determining whether or not a failure exists in a fuel cell system. A safe driving step stops an operation of the fuel cell system and drives the vehicle using only a high voltage battery system when the failure exists in the fuel cell system. A temporary stopping step determines a driving state of the vehicle and temporarily stops an operation of the high voltage battery system when it is determined that the driving state is a stop state. A re-driving step re-operates the high voltage battery system to restart the vehicle when the driving state is converted into a start state.
摘要:
A system and method for recovering an output of a fuel cell is provided. The system and method for recovering an output of a fuel cell includes: an output recovering device connected to a fuel cell stack through at least one coolant heater line; and a vehicle controller configured to communicate with the output recovering device and control supply of a coolant, air, and hydrogen to the fuel cell stack. The output recovering device also includes a current supplier configured to supply a current to the fuel cell stack and a controller configured to communicate with the vehicle controller and control the current supplied from the current supplier.
摘要:
An object of the present invention is to reduce power consumption in a storage apparatus that forms a control purpose power supply while making it possible to detect hydrogen, which has been leaked from a fuel cell system during running, even after stopping the vehicle. To accomplish this object, the power supply for a vehicle controller (23) is maintained by allowing a self-holding relay (35) to stay on even after turning off an ignition switch (11). On the other hand, the power supply for the vehicle controller (23) is turned off upon expiry of a predetermined period of time after turning off a propulsion system unless leakage of hydrogen from a fuel cell system (13) is detected.
摘要:
An electrical storage system includes a relay switching between an on state where an electrical storage device (10) is connected to a load and an off state where connection of the electrical storage device with the load is interrupted; a controller controlling an on-off state of the relay; and a current interruption circuit (60) interrupting energization of the electrical storage device. The current interruption circuit includes an alarm circuit (63) outputting an alarm signal indicating that any one electrical storage block is in an overcharged state by comparing a voltage value of each electrical storage block with a threshold; a latch circuit (64) retaining the alarm signal; a transistor (66) causing the relay to switch from the on state to the off state upon reception of an output signal of the latch circuit; and a power supply circuit (63d) generating electric power for operating the latch circuit using electric power of the electrical storage device.
摘要:
A method for diagnosing a fuel cell includes measuring a current and a voltage of a fuel cell stack while a fuel cell vehicle operates and sequentially storing the measured current and voltage. Whether or not the fuel cell vehicle operates at a constant current based on the stored current is determined. The measured current of the fuel cell stack is changed by driving any one of external current consumption apparatuses if it is determined based on the determination result that the fuel cell vehicle operates at the constant current.
摘要:
A temperature management system of a fuel cell vehicle includes a radiator, a water pump, an ion filter, a flow control valve, a state detector and a controller. The radiator is configured to emit heat generated from a fuel cell stack via cooling water, and the water pump is configured to circulate the cooling water through the system. Additionally, an ion filter is disposed in a branch line branched from a cooling water circulating line connecting the fuel cell stack and the radiator. The state detector is configured to detect cooling water state information and the flow control valve is configured to selectively interrupt a flow of the cooling water into the ion filter; and a controller configured to control an operation of the flow control valve depending on the cooling water state information detected by the state detector.