CPC H01M 8/04313 (2013.01) [G01L 5/042 (2013.01); H01M 8/248 (2013.01); H01M 2220/20 (2013.01)] | 10 Claims |
1. A method for determining a compressive tensile force acting on a fuel cell stack due to at least one tensioning element, wherein the fuel cell stack has a plurality of fuel cells arranged in a stacking direction between two end plates and at least one tensioning element clamped between the end plates in the stacking direction, the method comprising:
exciting a vibration of a vibratable section of the at least one tensioning element;
detecting an acoustic signal emitted from the vibratable section of the at least one tensioning element;
determining a fundamental frequency of the detected acoustic signal; and
determining a tensile force acting on the vibratable section of the at least one tensioning element on the basis of the determined fundamental frequency, the length of the vibratable section, and the linear mass distribution of the at least one tensioning element.
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