Fuel Cell Power Distribution via Temporal Offset Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fuel cell systems in vehicles experience continuous degradation due to platinum oxide (PtOx) film formation, leading to voltage losses and increased hydrogen consumption, necessitating battery compensation and larger battery systems to maintain power levels.
Innovation Solution
A device with a control unit that activates multiple fuel cell systems with a temporal offset electrical signal, allowing for varying power distribution and modulation of electrical currents to maintain constant total power, reducing PtOx formation and hydrogen consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple fuel cell systems are operated at identical power, then the power distribution is simplified, but the battery system experiences additional loading and aging
Solution Approach 1:
The patent applies periodic action by implementing oscillating power adjustments at different frequencies for multiple fuel cell systems. The control unit varies the power output of individual fuel cell systems periodically, creating temporal variations that prevent simultaneous PtOx formation in all systems. This periodic modulation resolves the contradiction by maintaining simplified multi-system operation while preventing battery overload through dynamic power balancing.
Solution Approach 2:
The patent implements dynamics by transitioning from static identical power distribution to dynamic differentiated power distribution. The control unit continuously adjusts the power output of each fuel cell system based on real-time conditions, applying different oscillation frequencies and amplitudes to each system. This dynamic approach maintains simplified control architecture while preventing battery system overload through adaptive power management.
2Stability of the object's composition
If fuel cell systems are operated at constant load point, then the operation is stable, but PtOx film formation increases leading to voltage losses
Solution Approach 1:
The patent applies periodic action by superimposing oscillating power variations on the constant load point operation. Each fuel cell system operates at its stable load point with added periodic power modulations at specific frequencies. This periodic disturbance prevents sustained PtOx film formation by continuously varying the electrochemical conditions, thereby reducing voltage losses while maintaining operational stability.
Solution Approach 2:
The patent implements parameter changes by dynamically varying the power output parameter of each fuel cell system around its optimal load point. The control unit adjusts power parameters periodically, changing the operating conditions just enough to prevent PtOx formation without deviating significantly from the optimal load point. This maintains operational stability while reducing energy losses.
3Loss of energy
If PtOx deposits are dissolved by switching off or discharging the fuel cell system, then the voltage losses are reduced, but the fuel cell system is temporarily limited in power supply
Solution Approach 1:
The patent applies preliminary action by continuously preventing PtOx formation through periodic power oscillations rather than waiting for deposits to form and then dissolving them. The control unit proactively modulates power output to maintain conditions that prevent PtOx accumulation, eliminating the need for subsequent shutdowns or discharges. This preliminary prevention maintains both low voltage losses and continuous power supply capability.
Solution Approach 2:
The patent implements continuity of useful action by maintaining continuous power generation without interruptions. The periodic power oscillations enable continuous operation while preventing PtOx formation, eliminating the need to switch off or discharge the system for maintenance. This ensures uninterrupted power supply while continuously reducing voltage losses through preventive PtOx management.
4Power
If a larger battery is used to compensate for power deviations, then the target power is maintained, but additional costs are incurred
Solution Approach 1:
The patent applies periodic action by using multiple fuel cell systems with oscillating power outputs at different frequencies to naturally compensate for power deviations. Instead of relying on a large battery to smooth power fluctuations, the periodic modulations of individual fuel cell systems create complementary power profiles that collectively maintain stable total power output. This reduces the required battery capacity while maintaining target power levels.
Solution Approach 2:
The patent implements dynamics by using dynamic power distribution control across multiple fuel cell systems to maintain target power. The control unit continuously adjusts individual system outputs based on real-time conditions, creating dynamic compensation for power variations without requiring oversized battery storage. This dynamic multi-system coordination reduces battery system size while maintaining power stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach maintains constant power levels without additional battery loading, reduces PtOx-related losses, and enhances fuel cell efficiency, achieving over 1% gain in efficiency per fuel cell system with reduced hydrogen consumption.
Implementation Method 1
a first fuel cell system and at least one further fuel cell system, which are configured to convert hydrogen and oxygen to water in order to generate electrical energy therefrom
Implementation Method 2
the device furthermore being configured to activate the first fuel cell system and the further fuel cell system by way of the electrical signal with temporal offset
Data Source
AI summary
An apparatus for splitting the power of fuel cell systems in a vehicle comprises: a first fuel cell system and at least one further fuel cell system, which are configured to convert hydrogen and oxygen into water in order to generate electrical energy therefrom, and a controller unit, which is configured to actuate the first fuel cell system and the further fuel cell system with an electrical signal. The apparatus is configured to actuate the first fuel cell system and the further fuel cell system with the electrical signal in time offset fashion.