Motive System Fuel Cells TRIZ Cases

A replaceable sacrificial electrode mounted through the end plate prevents separator corrosion while preserving stack sealing and serviceability.

Harvests liquid water from fuel cell cathode exhaust to humidify pressurized aircraft cabin air without onboard water storage.

Threshold-based control delays fuel cell output changes under high or low air pressure to recover energy and avoid low-performance operation.

Inclined dual-tube coolant ports use a gravity-drained gap to keep coolant out of hydrogen zones in aerospace fuel cell housings.

A shared loading plate mounts multiple fuel cell stacks through aligned fluid-joint apertures, cutting footprint while simplifying assembly and fluid routing.

Coordinated bypass and discharge valve control keeps compressor flow stable during cathode scavenging while speeding water removal and reducing noise.

An iterative voltage reference model helps fuel cell stacks detect degradation early, maintain stable output, and limit parasitic reactions.

H2 sensing in the exhaust line reveals purge path length and clogging, enabling adaptive purging that prevents fuel starvation and stack damage.

Measures fuel cell current and voltage during gas supply to verify fuel line inertization and reduce manual maintenance errors.

Predefined coolant valve opening control uses stack-generated heat to reach start temperature quickly without separate heaters.

A PtOx-based current-voltage comparison separates catalyst poisoning from stack dry-out, enabling targeted recovery and lower fuel use.

An adjustable re-tensioning element restores fuel-cell stack compression as elastic bands age, helping maintain sealing and efficiency.

Accumulated-current PWM control adjusts hydrogen purge valve opening to remove small hydrogen amounts without delay during low-current fuel cell operation.

One fuel cell module powers another during startup and cold shutdown, cutting battery count, converter complexity, and cost.

Timed or sensor-based compressed air purges clean rail fuel cell humidification units before clogging, extending service life and reducing maintenance.

Time-division voltage sensing and grouped cell monitoring cut read delay and communication power while enabling real-time error cell detection.

Machine learning predicts flight power demand to activate the right fuel cells and airflow early, reducing waste and damage risk.

A two-stage freeze check opens the purge valve when the gas-liquid separator freezes, discharging anode off gas and avoiding voltage loss.

By increasing reaction gas flow when the humidifier is cold, off-gas heat warms it quickly without a separate heater or extra parts.

Excess regenerative braking energy compresses and stores fuel cell nitrogen in a separate tank, reducing waste and avoiding hydrogen contamination.

Repositionable adjustment devices align stack components locally to offset tolerances, maintain gas distribution, and prevent short-circuits.

A torsion spring and rotatable shaft automatically retension fuel cell stack elements to keep compression and sealing stable as parts age.

Sub-stoichiometric oxygen-deficit startup generates heat, then a full discharge equalizes cell voltage and clears ice-related blockages.

A bypass passage and temperature-based idle control stop fuel cell power generation while preventing valve freezing and membrane deterioration.

Sensor-guided heating and condensate draining keep fuel cell humidifiers from freezing while maintaining proper air humidity.

Real-time voltage thresholds limit fuel cell current and power draw during transients, preventing starvation and extending stack life.

Heaters and compressor control thaw frozen coolant, limit battery drain, and restore fuel cell startup in sub-zero conditions.

Limits compressor speed and phase current during power demand changes to prevent fuel cell stack voltage drop and vehicle stumbling.