Fuel Cell Unit Conditioning With Hydrogen Cathode Flow
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Solution Overview
Problem
The existing methods for conditioning fuel cell units require extensive use of hydrogen, leading to high costs and the need for large storage spaces due to the requirement of alternating load states and long conditioning periods, which results in inefficient use of resources and increased production costs.
Innovation Solution
A method where hydrogen is passed through the channels for oxidizing agents for at least 50% of the conditioning duration, and simultaneously through the fuel channels, with a DC voltage applied to the anodes and cathodes to facilitate the reduction and oxidation of hydrogen, effectively removing oxide layers and impurities while maintaining hydration of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional conditioning methods with alternating load states are used, then oxide layers and impurities are removed and components are hydrated, but hydrogen consumption is high and conditioning time is long
Solution Approach 1:
The patent changes the operating parameters by applying DC voltage to create electrolysis conditions, passing hydrogen through oxidizing agent channels for at least 50% of conditioning duration, and maintaining specific temperature ranges (20-80°C). These parameter changes enable effective oxide layer removal and component hydration while significantly reducing hydrogen consumption compared to traditional methods
Solution Approach 2:
The patent replaces the mechanical/chemical process of fuel cell operation with an electrolysis-based chemical process. By applying DC voltage to electrolyze water and generate hydrogen in-situ, the system eliminates the need for external hydrogen supply during conditioning, substituting a chemical electrolysis mechanism for the traditional fuel cell electrochemical operation
2Reliability
If traditional conditioning methods with alternating load states are used, then oxide layers and impurities are removed and components are hydrated, but conditioning time is long requiring large storage rooms
Solution Approach 1:
The patent changes the operating parameters by applying DC voltage to create electrolysis conditions, passing hydrogen through oxidizing agent channels for at least 50% of conditioning duration, and maintaining specific temperature ranges (20-80°C). These parameter changes enable effective oxide layer removal and component hydration while significantly reducing hydrogen consumption compared to traditional methods
Solution Approach 2:
The patent implements continuous hydrogen passage through the oxidizing agent channels for at least 50% of the conditioning duration, rather than using intermittent alternating load states. This continuous action accelerates the removal of oxide layers and impurities while maintaining component hydration, reducing the overall conditioning time from several hours to a more efficient timeframe
3Loss of substance
If hydrogen is passed through oxidizing agent channels for at least 50% of conditioning duration, then hydrogen consumption is reduced and process is simplified, but effective removal of oxide layers and impurities must be maintained
Solution Approach 1:
The patent changes the operating parameters by applying DC voltage to create electrolysis conditions, passing hydrogen through oxidizing agent channels for at least 50% of conditioning duration, and maintaining specific temperature ranges (20-80°C). These parameter changes enable effective oxide layer removal and component hydration while significantly reducing hydrogen consumption compared to traditional methods
Solution Approach 2:
The patent uses DC voltage as an intermediary to drive the electrolysis process, which generates hydrogen in-situ and facilitates the removal of oxide layers and impurities. The voltage acts as a mediator that enables the chemical reactions necessary for conditioning without requiring large amounts of external hydrogen supply
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 reduces hydrogen consumption, simplifies the conditioning process, and allows for efficient hydration of components, thereby lowering production costs and storage requirements, while maintaining the performance of the fuel cell units.
Implementation Method 1
Hydrogen as a reducing agent enables an effective reduction of oxide layers and impurities, in particular by reducing metal oxides to metal using the reducing agent hydrogen
Implementation Method 2
a DC voltage is applied to the anodes and cathodes so that a chemical oxidation of the hydrogen takes place at the anodes and a chemical reduction of hydrogen takes place at the cathodes
Implementation Method 3
hydration of these components with water or moisture from the conditioning gas is achieved
Data Source
AI summary
Method for conditioning an electrochemical cell unit (53) before putting the electrochemical cell unit (53) into operation for converting electrochemical energy into electrical energy as a fuel cell unit (1) and/or for converting electrical energy into electrochemical energy as an electrolytic cell unit (49) having stacked electrochemical cells (52) and channels for conducting a fuel and/or an electrolyte and channels for conducting an oxidizing agent and/or an electrolyte being formed in the electrochemical cell unit (53), the method having the steps of: providing a conditioning fluid; and conducting the conditioning fluid through the channels (12) for fuel and/or electrolytes and/or conducting the conditioning fluid through the channels (13) for oxidizing agents and/or electrolytes, wherein, during at least 50% of the duration of the method for conditioning the electrochemical cell unit (53), hydrogen is conducted as the conditioning fluid through the channels (13) for oxidizing agents and/or electrolytes.