A leak in a fuel cell module can allow hydrogen and/or oxygen to escape from the fuel cell module, thereby creating a high risk of fire or explosion. This problem is addressed by providing a fuel cell installation with a fuel cell module that is enclosed in a gas-tight pressure container. Filling th
A leak in a fuel cell module can allow hydrogen and/or oxygen to escape from the fuel cell module, thereby creating a high risk of fire or explosion. This problem is addressed by providing a fuel cell installation with a fuel cell module that is enclosed in a gas-tight pressure container. Filling the pressure container with a protective gas ensures that if the fuel cell module does leak, no operating gas can escape from the module, with protective gas entering the module instead. A leak therefore no longer poses a risk. The leak can also be identified and located by a voltage drop in the cells affected by the leak.
대표청구항▼
The invention claimed is: 1. A fuel cell system, comprising: a fuel cell module enclosed in a gastight pressure vessel, wherein the fuel cell module includes a plurality of fuel cells connected in series, a gas feedline is connected to the gastight pressure vessel, an environment between the gastig
The invention claimed is: 1. A fuel cell system, comprising: a fuel cell module enclosed in a gastight pressure vessel, wherein the fuel cell module includes a plurality of fuel cells connected in series, a gas feedline is connected to the gastight pressure vessel, an environment between the gastight pressure vessel and the fuel cell module is filled with an inert gas or a shielding gas during operation under a pressure which is higher than an operating pressure of the fuel cell module and the gastight pressure vessel operates under superatmospheric pressure; and an electronic cell-voltage monitoring device for detecting a leak in the fuel cell module by monitoring a drop in the cell voltage. 2. The fuel cell system as claimed in claim 1, wherein the pressure vessel also surrounds a supply module of the fuel cell module. 3. The fuel cell system as claimed in claim 1, wherein the fuel cell system is designed as a power supply device for an electrical unit of a submarine. 4. The fuel cell system as claimed in claim 3, wherein the pressure vessel includes metal sufficient to shield a magnetic field and an electric field radiated by the fuel cell module. 5. A power supply device for an electrical unit of a submarine comprising the fuel cell system as claimed in claim 1. 6. The fuel cell system as claimed in claim 1, wherein escaped operating gas of the fuel cell module collects in the pressure vessel. 7. The fuel cell system as claimed in claim 1, further comprising a control device which detects a pressure change in the pressure vessel. 8. The fuel cell system as claimed in claim 7, further comprising: a control device for shutting down the fuel cell module. 9. The fuel cell system as claimed in claim 8, wherein the pressure vessel is designed for a pressure which is at least 1.5 times as great as an operating pressure of the fuel cell module. 10. The fuel cell system as claimed in claim 1, wherein the pressure vessel has a pressure which is at least 1.5 times greater than an operating pressure of the fuel cell module. 11. The fuel cell system as claimed in claim 1, wherein the inert or shielding gas is nitrogen. 12. The fuel cell system of claim 1, wherein the fuel cell module includes a plurality of at least one of tubular and planar fuel cells. 13. The fuel cell system of claim 1, wherein the fuel cell module includes a plurality of at least one of tubular and planar fuel cells, each with associated supply and discharge lines. 14. The fuel cell system as claimed in claim 1, wherein the electronic cell-voltage monitoring device emits a fault signal when the drop in the cell voltage is detected. 15. A power supply device for an electrical unit of a submarine, comprising: at least one fuel cell module enclosed in a gastight pressure vessel, wherein the at least one fuel cell module includes a plurality of fuel cells connected in series, an environment between the gastight pressure vessel and the at least one fuel cell module is filled with an inert gas or a shielding gas during operation under a pressure which is higher than an operating pressure of the fuel cell module and the gastight pressure vessel operates under superatmospheric pressure; and an electronic cell-voltage monitoring device for detecting a leak in the at least one fuel cell module by monitoring a drop in the cell voltage. 16. The power supply device of claim 15, further comprising: a device adapted to shut down the fuel cell module. 17. The power supply device of claim 16, wherein the pressure vessel is designed for a pressure which is at least 1.5 times as great as an operating pressure of the fuel cell module. 18. The power supply device of claim 15, wherein the pressure vessel is designed for a pressure which is at least 1.5 times as great as an operating pressure of the fuel cell module. 19. The power supply device of claim 15, wherein the pressure vessel is made from a metal sufficient to shield a magnetic field and an electric field radiated by the fuel cell module. 20. The power supply device of claim 19, wherein the metal is a i-metal. 21. The power supply device of claim 15, wherein the pressure vessel includes a layer of a metal sufficient to shield a magnetic field and an electric field radiated by the fuel cell module. 22. The power supply device of claim 21, wherein the metal is a μ-metal. 23. The power supply device of claim 15, wherein the electronic cell-voltage monitoring device emits a fault signal when the drop in the cell voltage is detected.
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