| 摘要 |
The invention relates to a method for detecting the current density distribution in a fuel cell stack by means of the magnetic field that surrounds the stack and is caused by the current flow in the stack. Sensors for the x, y and z component of the magnetic flow density (B) detect said density at several points outside the stack. The position of the sensors for the flow density is detected in relation to the stack. The thus detected values for the flow density and the allocated position are converted into current density values according to the position in the stack and by means of the Maxwell equation that defines the magnetic field strength and the material equation which relates the magnetic field strength to the flow density.
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