Fuel Cell Output Inspection via Catalyst Oxidation
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Solution Overview
Problem
Current methods for inspecting fuel cell output require large quantities of fuel gas and oxygen-containing gases to apply rated currents, leading to increased costs and reduced accuracy due to variations in the oxidation reduction state of the electrode catalyst.
Innovation Solution
A method involving an oxidation treatment step to stabilize the electrode catalyst, followed by a measurement step with a smaller current than the rated current, which suppresses variations in the oxidation reduction state, allowing for accurate output inspection at lower costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large current equivalent to the rated current is applied between the electrodes to suppress variation in oxidation reduction state of the electrode catalyst, then measurement accuracy is improved, but the quantity of fuel gas and oxygen-containing gas required increases and costs increase
Solution Approach 1:
The patent applies oxidation treatment to the electrode catalyst before performing the output measurement. This preliminary action stabilizes the oxidation reduction state of the catalyst, allowing accurate measurements to be taken with smaller currents that require less fuel gas and oxygen-containing gas.
Solution Approach 2:
The patent changes the oxidation reduction state parameter of the electrode catalyst through oxidation treatment, transforming it from a variable state to a stable state. This parameter change enables accurate measurements without requiring large currents and excessive gas quantities.
2Quantity of substance
If a small current is applied between the electrodes to reduce costs and gas consumption, then the quantity of fuel gas and oxygen-containing gas is reduced, but variation in oxidation reduction state of the electrode catalyst causes reduced measurement accuracy
Solution Approach 1:
The oxidation treatment is performed as a preliminary step before the measurement process. This preliminary stabilization of the electrode catalyst allows subsequent measurements to be conducted with small currents while maintaining high accuracy, thus reducing gas consumption without sacrificing measurement quality.
3Measurement precision
If a large current is applied between the electrodes to eliminate variation in oxidation reduction state, then measurement accuracy is improved, but the complexity and scale of the gas apparatus required increases
Solution Approach 1:
By performing oxidation treatment as a preliminary step, the electrode catalyst is stabilized before measurement. This eliminates the need for complex, large-scale gas apparatus required to deliver large currents, as accurate measurements can now be taken with simpler, smaller-scale equipment using minimal gas quantities.
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 enables accurate and cost-effective fuel cell output inspection by stabilizing the electrode catalyst before measurement, reducing variations and eliminating the need for large-scale gas apparatus, thus achieving high accuracy with reduced gas consumption.
Implementation Method 1
an oxidation step of applying oxidation treatment to an electrode catalyst contained in the anode and the cathode
Implementation Method 2
Fuel cells having an anode on one surface of an electrolyte membrane of solid polymer, and a cathode on the other surface of the electrolyte membrane are known
Data Source
AI summary
In a method of inspecting an output of a fuel cell, an oxidation step is performed, and thereafter, a measurement step is performed. In the oxidation step, oxidation treatment is applied to an electrode catalyst contained in an anode and a cathode. After the oxidation treatment is applied to the electrode catalyst of the anode and the cathode, in the measurement step, a measurement current which is smaller than a rated current of the fuel cell is applied to the anode and the cathode to measure the output of the fuel cell.