Device and Method for Heating a Fuel Cell or a Fuel Cell Stack
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Abstract
A fuel cell system includes a fuel cell stack which has at least one fuel cell and has at least one electrical connection per terminal, wherein the fuel cell stack is connected via the connections to an alternating voltage generating device for electrical heating of the fuel cell stack, a rectangular alternating voltage which is rounded-off at the edges being generated by the alternating voltage generating device.
5 Citations
42 Claims
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1-22. -22. (canceled)
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23. A fuel cell system, comprising:
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a fuel cell stack which has at least one fuel cell and has at least one electrical connection per terminal, wherein the fuel cell stack is connected via at least one electrical connection to an alternating voltage generating device for electrical heating of the fuel cell stack, a rectangular alternating voltage which is rounded-off at the edges being generated by the alternating voltage generating device. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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- 35. A heating method for heating a fuel cell stack which has at least one fuel cell, wherein an alternating current is supplied to at least one of the fuel cells of the fuel cell stack, a rectangular alternating current, which is rounded-off at edges thereof by a sinusoidal superimposition, being superimposed upon a no-load voltage or upon an operating voltage of the fuel cell stack in order to supply the alternating current.
Specification