Method and Device for Operational Control of Fuel Cell Modules
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Abstract
A method and a device for operational control of fuel cell modules, in particular, to maintain the lifespan thereof. The electrochemical cells of the fuel cell are electrically connected to a junction box by plural modules such that control density is maintained for a given period with a weak charge and a duration of operation of a module is used such as to increase the lifespan of the fuel cell.
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Citations
30 Claims
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1-15. -15. (canceled)
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16. A method of managing operation of a fuel cell unit of a type cooperating with a reformer, in which a cell unit of at least one electrochemical cell including a membrane-electrode assembly is electrically connected via a controllable electrical junction box to other electrochemical cells, the method comprising:
constituting plural groups of the electrochemical cells by connecting or disconnecting in series their membrane-electrode assemblies so that current density of current passing through at least the electrochemical membrane-electrode assembly cell lies within a predetermined interval provided so as to maintain, whatever an electrical regime of the fuel cell unit, optimum membrane-electrode assembly hydration conditions. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A system for managing operation of a fuel cell unit of a type cooperating with a reformer for equipping an automobile, a propulsion unit of which derives at least some of its energy from a fuel cell unit of a stack of cells, the system comprising:
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a controllable junction box; and
means for determining a series connection or a disconnection of at least one group of electrochemical membrane-electrode assembly cells so as to maintain a current density of current passing through at least the electrochemical membrane-electrode assembly cell within a predetermined range. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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Specification