Fuel Cell Storage Protection Using Inert Gas and Thermal Control
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Solution Overview
Problem
Fuel cells degrade prematurely due to residual reaction gases and low storage temperatures, leading to reduced service life, especially when not in operation.
Innovation Solution
A method and device that produce inert gas and thermal energy from fuel and ambient air using a catalytic converter, which are then used to replace residual gases and control temperature in fuel cells, preventing degradation and extending service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If fuel cells are stored at low temperatures to conserve energy, then energy consumption during storage is reduced, but degradation of the fuel cell increases and service life shortens
Solution Approach 1:
The fuel cell system uses its own generated thermal energy during operation to heat the storage environment, eliminating the need for external heating systems. The waste heat from fuel cell operation is redirected to maintain temperature during storage, making the system self-sufficient for thermal management.
Solution Approach 2:
The system dynamically adjusts storage temperature based on operational conditions. During operation, thermal energy is retained and reused; during storage, the temperature is maintained above freezing points through insulated housing and residual heat, preventing degradation while minimizing energy consumption.
2Device complexity
If residual reaction gases are not exchanged in the fuel cell during switched-off phases, then the system remains simple and requires no additional components, but degradation phenomena occur and service life decreases
Solution Approach 1:
The fuel cell system performs multiple functions: it generates electrical energy during operation and simultaneously prepares the internal atmosphere for storage by consuming residual oxygen through continued catalytic activity or controlled air supply, eliminating the need for separate gas exchange systems.
Solution Approach 2:
The catalytic converters continue to function during switched-off phases, continuously consuming residual oxygen and preventing degradation. This continuous protective action occurs without additional components, utilizing the existing catalysts already present in the fuel cell system.
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
The method effectively prevents detrimental reactions and degradation in fuel cells by replacing residual gases with inert gas and maintaining optimal temperatures, thereby prolonging the service life and ensuring reliable startup even at low temperatures.
Implementation Method 1
By a converter device of the energy supply device, an inert gas and thermal energy are produced from the fuel
Implementation Method 2
an inert gas and thermal energy are produced from the fuel in this case
Implementation Method 3
At the anode, the hydrogen is oxidized catalytically to hydrogen ions with the release of electrons
Implementation Method 4
The hydrogen ions reach the cathode region through an electrolyte that is usually present in the form of a membrane
Implementation Method 5
the converter device is, in particular, a catalytic converter device; that is, it has a catalyst that promotes the reaction of the fuel with the ambient air
Data Source
AI summary
The invention relates to an energy supply device with at least one fuel cell and to a method for operating at least one energy supply device with at least one fuel cell, which has at least one anode that can be supplied with a fuel and at least one cathode that can be supplied with ambient air for generating electrical energy. The proposed energy supply device has a converter device.