Abstract: Methods and systems for managing power of a hybrid vehicle that includes a fuel cell and a traction battery are described. In one example, cooling of the battery and fuel cell may be adjusted preemptively before the hybrid vehicle reaches high load conditions to extend fuel cell durability over its life span, meanwhile the hybrid vehicle may meet driver demand for a longer period of time while operating at the high load and high ambient temperature conditions.

Abstract: A system, such as for a fuel cell electric vehicle, includes a fuel cell stack (FCS) and a controller. The FCS is configured to provide, such as for vehicle propulsion, a stack power commensurate with a stack power request. The stack power is a product of a stack current of the FCS and a stack voltage of the FCS. The controller is configured to, upon the stack voltage meeting a predetermined threshold, control the FCS to increase the stack current to cause the FCS to provide an increased stack power commensurate with an increased stack power request.

Abstract: A system includes a fuel cell stack (FCS) and a controller. The controller adjusts a stack current of the FCS to a desired amount to cause the FCS to provide a power commensurate with a power request. The controller employs a stack power model of the FCS in adjusting the stack current.

Abstract: A system includes a fuel cell stack and a controller. The controller is configured to operate the fuel cell stack with a given air stoic ratio while a temperature of the fuel cell stack is greater than a temperature threshold and to operate the fuel cell stack with a lower air stoic ratio, to thereby suppress a stack voltage of the fuel cell stack in order to increase heat generation of the fuel cell stack, while the temperature of the fuel cell stack is lower than the temperature threshold.

Abstract: Systems and methods of managing the voltage of fuel cells during no-load or low load events are disclosed. The systems may employ one or more valves such as an inlet and outlet valve for metering the fuel (e.g., hydrogen) and/or oxidant (e.g., oxygen) provided to the fuel cell. The voltage or voltage rise may be limited by starving the fuel cell of, for example, oxygen. A controller may be employed for controlling the one or more valves during a no-load or low load event such as start-up, idling, or stopping.

Abstract: A computer that includes a processor and a memory can determine a final trajectory for a vehicle by determining a candidate trajectory of a first object based on a detected second object. The candidate trajectory can be input to a reachable polyhedral marching processor to determine dynamic occupancy polyhedrals based on a shape of the candidate trajectory. A reachable tube can be determined based on combining the dynamic occupancy polyhedrals and the final trajectory can be determined based on the reachable tube avoiding the detected second object.

Abstract: A vehicle includes a fuel cell, an inlet valve, a purge valve, and a controller. The fuel cell has an anode side configured to receive hydrogen. The inlet valve is configured to open to deliver the hydrogen to the anode side. The purge valve is configured to open to purge water and nitrogen from the anode side. The controller is programmed to, operate the inlet valve to inject hydrogen into the anode side via opening the inlet valve followed by closing the inlet valve. The controller is further programmed to, in response to a concentration of the hydrogen in the anode side being less than threshold, open the purge valve to purge water and nitrogen from the anode side.

Abstract: A vehicle includes a motor, a battery, a fuel cell stack, and a controller. The battery is configured to supply power to the motor to propel the vehicle. The fuel cell stack is configured to generate power to charge the battery. The controller is programmed to, while traversing a route with the fuel cell stack not operating and, responsive to data indicative of a predicted distance to empty at an end of the route being greater than a distance threshold, inhibit starting of the fuel cell stack during the traversing.

Abstract: A vehicle includes a fuel cell stack arranged to generate power for propulsion, an auxiliary fuel cell stack component, and a processor. The processor, responsive to a crowdsourced average value of an operating parameter of an auxiliary fuel cell stack component of other fuel cell vehicles being different, for a pre-defined power level, than an average value of a same operating parameter of the auxiliary fuel cell stack component by a pre-determined amount, purge the fuel cell stack of nitrogen.

Abstract: The disclosure relates to a vehicle with a traction battery and a fuel cell system, and a controller programmed to purge the fuel cell system by flowing air through it to remove moisture from the fuel cell system. The controller is configured to initiate the purge based on a distance of the vehicle from a destination, a state of charge of the traction battery, and ambient temperature conditions at the destination. The freeze preparation process can be initiated when the vehicle is approaching its destination and can be predicted using connectivity and communication with off-board sources.

Abstract: A system includes a fuel cell stack (FCS) and a controller. The controller adjusts a stack current of the FCS to a desired amount to cause the FCS to provide a power commensurate with a power request. The controller employs a stack power model of the FCS in adjusting the stack current.

Abstract: Systems and methods of managing the voltage of fuel cells during no-load or low load events are disclosed. The systems may employ one or more valves such as an inlet and outlet valve for metering the fuel (e.g., hydrogen) and/or oxidant (e.g., oxygen) provided to the fuel cell. The voltage or voltage rise may be limited by starving the fuel cell of, for example, oxygen. A controller may be employed for controlling the one or more valves during a no-load or low load event such as start-up, idling, or stopping.

Abstract: A system, such as for a fuel cell electric vehicle, includes a fuel cell stack (FCS) and a controller. The FCS is configured to provide, such as for vehicle propulsion, a stack power commensurate with a stack power request. The stack power is a product of a stack current of the FCS and a stack voltage of the FCS. The controller is configured to, upon the stack voltage meeting a predetermined threshold, control the FCS to increase the stack current to cause the FCS to provide an increased stack power commensurate with an increased stack power request.

Abstract: A vehicle includes a fuel cell having an air inlet port and an air outlet port and an air supply system having a compressor connected in fluid communication with the inlet port and a throttle valve connected in fluid communication with the outlet port. A controller is programmed to change a position of the throttle valve based on a target mass air flow, a measured mass air flow, a measured pressure, and the position of the throttle valve.

Abstract: A vehicle includes a fuel cell, an inlet valve, a purge valve, and a controller. The fuel cell has an anode side configured to receive hydrogen. The inlet valve is configured to open to deliver the hydrogen to the anode side. The purge valve is configured to open to purge water and nitrogen from the anode side. The controller is programmed to, operate the inlet valve to inject hydrogen into the anode side via opening the inlet valve followed by closing the inlet valve. The controller is further programmed to, in response to a concentration of the hydrogen in the anode side being less than threshold, open the purge valve to purge water and nitrogen from the anode side.

Abstract: An automotive fuel cell stack includes anodes and cathodes, and a controller that, after receiving data indicating that load current demand is within a first pre-determined range, modulates a flow rate of air to the cathodes between zero and a pre-determined value until a cell output voltage achieves a value falling within a second pre-determined range greater than zero.

Abstract: A vehicle includes a fuel cell having an air inlet port and an air outlet port and an air supply system having a compressor connected in fluid communication with the inlet port and a throttle valve connected in fluid communication with the outlet port. A controller is programmed to change a position of the throttle valve based on a target mass air flow, a measured mass air flow, a measured pressure, and the position of the throttle valve.

Abstract: An automotive fuel cell stack includes anodes and cathodes, and a controller that, after receiving data indicating that load current demand is within a first pre-determined range, modulates a flow rate of air to the cathodes between zero and a pre-determined value until a cell output voltage achieves a value falling within a second pre-determined range greater than zero.