Disclosed are a fuel cell power net system and a method for controlling the same. The fuel cell power net system includes: a fuel cell controller configured to control current output from a fuel cell unit; at least one DC/DC converter configured to boost DC voltage and to output the boosted DC voltage; a battery connected to the fuel cell unit in parallel so as to supply DC power to the fuel cell unit; a load controller configured to provide demand output information; and a fuel cell power controller configured to receive the demand output information, to calculate output levels required by the fuel cell unit and the battery, to compare a current output level of the fuel cell unit with the output level required by the fuel cell unit, and to provide a control value to the fuel cell controller depending on a result of the comparison.

A system includes a fuel cell stack and a controller. The controller is configured to determine a current density of the fuel cell stack, determine a threshold voltage value, and compare a measured average fuel cell voltage value and the threshold voltage value. The controller is configured to set an allowed current and power draw of the fuel cell stack.

To make a fuel cell stack reliably discharge at the time of vehicle collision, a control system for an electric vehicle is provided with a fuel cell stack generating electric power by an electrochemical reaction between fuel gas and oxidizing gas and supplying generated electric power to an electric motor for driving the vehicle, a first electrical resistor for discharge electrically connected to the fuel cell stack through an electrically controlled type discharge switch, a discharge control circuit controlling an on/off state of the discharge switch, and a collision detector detecting a vehicle collision and outputting a collision signal to the discharge control circuit. When a collision signal is input to the discharge control circuit, it turns the discharge switch on and electrically connects the fuel cell stack to the first electrical resistor for discharge, to thereby discharge the fuel cell stack. A power supply of the discharge control circuit is comprised of the fuel cell stack.

A method for controlling a fuel cell of a vehicle, is provided. The vehicle includes a fuel cell and a power battery. The method includes the following steps: detecting road condition information for a planned driving route of the vehicle; detecting a battery level of the power battery; and controlling an activation or a deactivation of the fuel cell according to the road condition information and/or the battery level of the power battery.

An FCV includes an FC system and a battery. The FC system includes an FC stack and a boost converter that adjusts output from the FC stack. An FDC-ECU controls output from the FC system such that output from the battery does not exceed an output upper limit of the battery. The output upper limit of the battery is set to lower with lowering in SOC when the SOC becomes lower than a threshold value. A target SOC is higher than the threshold value.

The application relates to a vanadium battery SOC balance system, which comprises a detection module, a control module, a load module and vanadium battery modules; the vanadium battery modules are connected in series; the detection module is used for detecting and outputting SOC values of the vanadium battery modules; the control module is connected with the detection module and used for receiving the SOC values and connecting the load module into one of the vanadium battery modules according to the SOC values. The detection module can detect the SOC values of the vanadium battery modules, the control module can insert a load into one of the vanadium battery modules according to the SOC values, the vanadium battery modules inserted into the load module can discharge through the load module, the SOC values of the vanadium battery modules are reduced, and the SOC values of the vanadium battery modules are balanced.

The present disclosure is directed to systems and methods involving a power converter and various control schemes in which the power converter is able to monitor and intelligently manage various operational scenarios such as startup and shutdown of a fuel cell, load sharing among two or more available power sources, and exporting excess power from one available power source to a different power source, as well as transient step up and step down load situations requiring an immediate increase or decrease in the power being provided to a load. Various hierarchical power converter control schemes are also disclosed for addressing different types of operational scenarios, which enable the power converter to centrally manage some or all of the available power sources to optimally use all of the power supplying resources available to it to best meet the requirements of the load.

A fuel cell vehicle provides improved space utilization and a desired intensity of voltage. The fuel cell vehicle includes a fuel cell, a junction box disposed on the fuel cell, and a power controller disposed between the fuel cell and the passenger compartment. The power controller boosts the output voltage of the fuel cell.

A power generation cell of a fuel cell stack includes a resin frame equipped MEA and a first metal separator and a second metal separator. In the power generation cell, the relationship of P1>P2>P3 is satisfied, where P1 indicates a first surface pressure applied from a first seal part and a second seal part to a resin frame member, P2 indicates a second surface pressure applied from a first support part and a second support part to the overlap part, and P3 indicates a third surface pressure applied from first flow field forming protrusions and second flow field forming protrusions to the power generation area.

Systems and methods for operating an electric energy storage device are described. The systems and methods may generate a state of charge estimate that is based on negative electrode plating. An overall state of charge may be determined from the state of charge estimate that is based on negative electrode plating and a state of charge estimate that is not based on negative electrode plating.